get ("/fastapi", response_class=RedirectResponse, status_code=302) async def redirect_fastapi (): return f'/your_view/'. In simple words, it refers to the login functionality in our app. I'd intend to implement it in most of my endpoints except for a few whitelisted ones, but I find it hard to unit test endpoints that require authentication so I'm thinking of implementing it in a middleware with a simple if-else check for whitelisted. py. utility. FastAPI Learn Tutorial - User Guide Security OAuth2 with Password (and hashing), Bearer with JWT tokens Now that we have all the security flow, let's make the application actually secure, using JWT tokens and secure password hashing. The exact method for validating a signature depends on the algorithm defined in the header segment and used to generate the signature itself. You'll connect the client and server applications to see the full. FastAPI framework, high performance, easy to learn, fast to code, ready for production. Access tokens and refresh tokens; Freshness Tokens; Revoking Tokens; Support for WebSocket authorization トークンにfoobarが含まれている場合、Authorizationヘッダーの内容は次のようになります: Bearer foobar。 FastAPIのOAuth2PasswordBearer¶. The app = FastAPI () all the uvicorn server to run the myapp. 4. FastAPI docs suggest writing it manually, but. JWTはシンプルでコンパクトなトークンで、ユーザーを認証し情報を安全に送信するためにHTTPリクエストで簡単に渡すことができ. In this article, we’ll explore the ins and outs of FastAPI JWT. py . I have implemented login authentication with OAuth2PasswordBearer and generating tokens with JWT so far so good. env secret=please_please_update_me_please algorithm=HS256 fastapi_jwt/main. Step 1: In your project directory create a file called main. You can use a custom WSGIMiddleware and authorize the call to flask app inside that like this: from fastapi import FastAPI, Depends, HTTPException from fastapi. HTTP Basic Auth Using the Request Directly Using Dataclasses Advanced Middleware. from fastapi import FastAPI from fastapi. Create a folder auth in a root and here three. from typing import Optional from fastapi import FastAPI, HTTPException, Depends, Request from fastapi. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Storing fastapi-csrf-token in cookies or serve it in template's context; Installation. The following examples show you how to integrate this. Add a comment. I will show you: JWT Authentication Flow for User Signup & User Login; Project Structure for React JWT Authentication (without Redux) with LocalStorage, React Router & Axiosjgontrum/fastapi_jwt_auth_with_aws_cognito. OAuth2 实现密码哈希与 Bearer JWT 令牌验证 中间件 CORS（跨域资源共享） SQL (关系型) 数据库. aws fastapi kubernetes python. websocket: An instance of WebSocket, it's required if protected. FastApi OAuth2 with JWT Token not working. username to get the email of your user. We are going to use FastAPI security utilities to get the username and password. In this tutorial, we’re gonna build a React JWT Authentication example with LocalStorage, React Router, Axios and Bootstrap (without Redux). 4. fastapi fastapi-admin fastapi-jwt-auth fastapi-amis-admin fastapi-user-auth fastapi-user fastapi-auth fastapi-rbac. FastAPI Auth. py. Dynamic Token Expires. Transport + Strategy = Authentication backend¶ This is done by scanning the request for the JWT in the Authorization header. @app. py). Passwords should not be stored in open form in the database, the administrator should not be able to see the current passwords of users. IndominusByte / fastapi-jwt-auth Public. include_routers(users. User sends credentials to the backend via POST and backend will set the JWT to Cookie and. algorithm (Optional[str]): The JWT encryption algorithm. public_key (Optional[Union[str, pydantic. jwt-authentication fastapi Resources. Once you sign in, Auth0 takes you to the Dashboard. jsアプリにおける認証と認可を処理するためによく利用される方法としています。. py","contentType":"file. General Options. When a user logs in, Service B provides a bearer token, and user accounts are classified into two types: normal users and superusers, with superusers having the is_superuser field set to True in the JWT payload. For exemple, if you use python requests library, here are the docs. Restricted Vector Tile access with FastAPI & PostGIS. responses import JSONResponse from fastapi_jwt_auth import AuthJWT from fastapi_jwt_auth. The key is to specify different scheme_name for each ApiKey header, otherwise they will collide and probably one will overwrite the other in OpenAPI schema. Access tokens and refresh tokens; Freshness Tokens; Revoking Tokens; Support for WebSocket authorization JWT Authentication in FastAPI: Building Secure APIs We live in a world where the security of the user is really important. Follow. Better to have auth first then validation. This is done by scanning the request for the JWT in the Authorization header. pip install fastApi-jwtAuthCopy PIP instructions. Install package with pip: pip install fastapi-authtools. It’s often used to do authentication between the frontend and backend of. The purpose of this is to allow putting all of the auth code in its own file. React will be used as the client application. You can you it with JWT-token (default in you headers). load_config (callback) This decorator sets the callback function to overwrite state on AuthJWT class so when you initialize an instance in dependency injection default value will be overwritten. . Other services can then make use of this token to know more about the user. com/k4black/fastapi-jwt Features OpenAPI schema generation. com/k4black/fastapi-jwt Features OpenAPI schema generation Native integration with FastAPI Access/Refresh JWT JTI Cookie setting Installation Configuration from fastapi_users. FastAPI framework, high performance, easy to learn, fast to code,. This article is aimed at helping you get started with implementing JWT authentication in your Go web applications using the golang-jwt package. See RFC 7519, section 8. txt mv config. Branches Tags. accept () while True: data = await websocket. Defaults to "HS256". Then install the FastAPI and required libraries. MapBox Vector Tiles offer a modern and fast way to accomplish that goal: the data gets encoded to small-sized protocol buffers, and then get decoded on the client. Pull requests. responses import JSONResponse from fastapi_jwt_auth import AuthJWT from. FastAPI extension that provides JWT Auth support (secure, easy to use and lightweight), if you were familiar with flask-jwt-extended this extension suitable for you, cause this extension inspired by flask-jwt-extended 😀. access_token = request. In recent years, however, a de facto standard has emerged in the form of OAuth 2. I followed FastAPI's documentation to set up OAuth2 with password hashing and JWT bearer tokens. from jose import JWTError, jwt. Difference Between Handler, Handle and HandlerFunc. Code; Issues 46; Pull requests 12; Actions; Projects 0; Security; Insights; New issue Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. If you need an example project, one can be found on GitHub here. FastAPI framework, high performance, easy to learn, fast to code, ready for production. The PyPI package fastapi-jwt-auth receives a total of 9,467 downloads a week. It enables any FastAPI applications to authenticate with Azure AD to validate JWT tokens and API permissions. API with Python, FastAPI, and MongoDB: JWT Authentication. This is the second of a two part series on implementing authorization in a FastAPI application using Deta. e. In this guide we'll build a JWT authentication system with FastAPI. 04? What is the probability that your life will have lasted for 100 years once you die?. 3. The password "flow" is one of the ways ("flows") defined in OAuth2, to handle security and authentication. exceptions import AuthJWTException from pydantic import BaseModel app = FastAPI() class User(BaseModel): username: str password: str # in production you. Now we add the function responsible for authentication, let’s break it down to see what it does: Learn More About Oso, FastAPI, and Python. ). Running. 10+ non-Annotated Python 3. Basic Usage. Defaults to ["fastapi-users:auth"]. So now we can use the same Depends with our get_current_user in the path operation: Python 3. make build; make dev; docker ps should show 2 docker containers (gotrue_postgresql and gotrue_gotrue); That's it! Visit the health checkendpoint to confirm that gotrue is running. In the simplest case, someone else takes care of acquiring a valid JWT token so that FastAPI then can simply decode and read the user. After copying the URL & Key, navigate to the Tables tab and create users table and add 3 columns: name , email , and password . On my frontend there is some custom auth flow with jwt, which differs from OAuth2 flow (clearly described in FastAPI docs), only by how credentials are sent to /login endpoint. Improve this answer. Here example use Redis for revoking a tokens: from fastapi import FastAPI, HTTPException, Depends, Request from fastapi. Once you have a FastAPIUsers instance, you can make it generate a single OAuth router for a given client and authentication backend. 2. You could also use from starlette. 签名其实不应该称为加密，它不可逆称为散列值好一点，它的作用是服务端验证jwt中的payload是否被篡改或是否是伪造的。. The authentication server should be built using a mySQL database. login decorator for JWT token verification · Issue #1089 · tiangolo/fastapi · GitHub. Dynamic Token Expires. JWT token authentication. It has a KeyCloak server that is used for all authentication, and OpenID Connect and JWTs in the way that is considered best practice. First, create a project in Supabase from the Supabase dashboard. main. In the previous article, we learned a bit about JWT, set up the project, and finished the building blocks of authorization logic. FastAPI 实用工具¶. wsgi import WSGIMiddleware from flask import Flask, escape, request from starlette. Raise a 401 (unauthorized) if. websocket ("/api/ws") async def websocket_endpoint (request: Request, websocket: WebSocket):. JWT stands for JSON Web Token. These include support for OAuth2 password flow and JSON Web Tokens (JWT), ensuring secure and. 由于它是新的，FastAPI既有优点也有缺点。 在积极的一面，FastAPI实现了所有的现代标准，充分利用了最新Python版本所支持. Building a Book Store API in Golang With Gin. get_db)): This assume that the token has. Revel. Here is a full working example with JWT authentication to help get you started. You can also follow the FastAPI documentation. I have a simple app that takes a user-session key, this may be a jwt or not. we need to generate a jwt token and a jwt bearer. In our React app, this allows us to have the concept of login-required pages. dependencies: Return the authenticated JWT payload. Followed technique is production grade and by the end of this walkthrough, you should've a system ready to authenticate users. Get started with FastAPI JWT authentication – Part 1. Pydantic models for verifying session data. async def websocket_auth ( websocket : WebSocket ): try : cookie = websocket . e. HTTP Basic Auth Using the Request Directly Using Dataclasses Advanced Middleware. You just have to define a constant SECRET. FastAPI Azure Auth - Azure AD authentication for your APIs with single and multi tenant support. 8+ non-Annotated. pip install fastapi-jwt-auth Ahora volvemos a editar el main. . FastAPI 如何使用基于JWT令牌的授权保护 FastAPI API端点 在本文中，我们将介绍如何使用JWT令牌进行授权保护FastAPI API端点。JWT（JSON Web Token）是一种基于令牌的身份验证和授权机制，被广泛应用于Web应用程序中。 阅读更多：FastAPI 教程 什么是JWT？ JWT（JSON Web Token）是一种开放标准（RFC 7519），它定义了Fastapi provides multiple authentication mechanisms like OAuth2, JWT, HTTP Basic Authentication etc. from typing import Annotated from fastapi import Depends, FastAPI from fastapi. Here is how you can use a decorator that adds extra parameters to the route handler: from fastapi import FastAPI, Request from pydantic import BaseModel class SampleModel (BaseModel): name: str age: int app = FastAPI () def do_something_with_request_object (request: Request): print (request) def auth_required. Readme License. The following is a step-by-step walkthrough of how to build and containerize a basic CRUD app with FastAPI, Vue, Docker, and Postgres. JWT Reedmakers, Victoria, British Columbia. However, this can still create some security vulnerabilities if your token is stolen. FastAPI-User-Auth is a simple and powerful FastAPI user RBAC authentication and authorization library. It enables any FastAPI applications to authenticate with Azure AD to validate JWT tokens and API permissions. Validate access tokens in JSON Web Token (JWT) format using FastAPI. Supabase is a JSON Web Token based Auth service - it takes in the credentials of a user (for instance email and password) and returns a token that is used to securely transit information between parties. include_router( fastapi_users. FastAPI is a new Python framework to facilitate the creation of APIs. headers ["Authorization"] # Here your code for verifying the token or whatever you. auth_success = await websocket_auth(websocket=websocket) was a function that used a function from FastAPI-users to validate the jwt token in the cookie. You can sign up here. fastapi fastapi-admin fastapi-jwt-auth fastapi-amis-admin fastapi-user-auth fastapi-user fastapi-auth fastapi-rbac. FastAPI-User-Auth. We'll also wire up token-based authentication. Like many other web frameworks, FastAPI provides several tools that can help us deal with security easily and in a standard way. Authentication means identifying a user. The Microsoft Identity library for Python's FastAPI provides Azure Active Directory token authentication and authorization through a set of convenience functions. Configuration from fastapi_users. x. 0 access tokens. I'm trying to use fastapi to return some basic ML models to users. Go to Applications, open the menu next to the. utcfromtimestamp (token_data. Following the FastAPI tutorial I was able to implement the auth flow for the Users API. 1. The first thing to do after you sign up is create your project:FastAPI 实用工具¶. Based on FastAPI-Amis-Admin and provides a freely extensible visual management interface. 4. In this post, we are going to learn to create an. Hello everyone! Welcome to the PyCharm FastAPI Tutorial Series. What is Supabase Auth. Create a get_current_user dependency¶. Solution: Provide a valid Authorization HTTP request header. Can we erite a middleware for it, and add a userid to request object, so that we can take that in. Authentication Service. Authentication in FastAPI Authentication is the process of verifying users before granting them access to secured resources. 1. This pattern is very simple, you can choose to mark some access tokens as fresh and other as a non-fresh tokens, and use the fresh_jwt_required () function to only allow fresh tokens to access the certain endpoint. FastAPI extension that provides JWT Auth support (secure, easy to use, and lightweight)Securing FastAPI with JWT Token-based Authentication; JWT Authentication Best Practices; One Time Passwords. Code for generating JWT token from JWK key set. There are 2 APIs with a dependency to validate method. This is the first of a two part series on implementing authorization in a FastAPI application using Deta. py. In the previous post, we implemented a logic to create JWT tokens. Let’s create a new file in the “auth” folder called auth_bearer. You can easily adapt the code in this article to any database supported by SQLAlchemy, like: PostgreSQL; MySQL; SQLite; Oracle; Microsoft SQL Server, and many more. Register a FastAPI application in the Auth0 Dashboard. token: The encoded JWT, it's required if the protected endpoint use WebSocket to authorization and get token from Query Url or Path. Notifications Fork 122; Star 569. You have to set the requires_verification parameter to True on the router instantiation method: app. workers. The answer above does not account that the token_data. Remember that dependencies can have sub-dependencies? get_current_user will have a dependency with the same oauth2_scheme we created before. Developers can easily secure a full-stack application using Auth0. Base. . utcfromtimestamp (token_data. See RFC 7519, section 8. This article will teach you how to add JSON Web Token (JWT) authentication to your FastAPI app using PyMongo, Pydantic, FastAPI JWT Auth package, and Docker-compose. responses import Response or from starlette. Authentication and authorization are seperated from the services to keep things clean, one service does for all. You can sign up here. responses import JSONResponse from fastapi_jwt_auth import AuthJWT from fastapi_jwt. Where to look for a JWT when processing a request. One time passwords (OTPs) are commonly used as confirmation for authentication. Create a " security scheme" using HTTPBasic. send_text (f"Message text was: {data} ") In this tutorial, we will walk you through the process of integrating JWT (JSON Web Tokens) with FastAPI to secure user authentication. This series is focused on building a full-stack application with the FastAPI framework. In this tutorial, we'll cover the complete FARM stack; create a FastAPI server, persist and fetch data asynchronously from MongoDB Atlas, and finally render it in the browser with React. yaml. Secure password hashing by default. Python 3. 0, and implement straightforward OAuth2 Password authentication flow using Bearer and JSON Web Tokens (JWT). Flask-Project-Template for a full feature Flask project including database, API, admin interface, etc. 1k. Supports custom user models (both ORM and pydantic) without sacrificing any type-safety. The main idea is to have a dependency that acts as authorization: the endpoint function would then either respond with the resource or with an unauthorized response. Our authentication logic will be relying on. In this tutorial we are buliding the FastApi-boiler-plate-code, which includes user-registration,user-login with JWT token authentication. we will write generate token and bearer token in auth_repo. Use that security with a dependency in your path operation. See RFC 7519, section 8. Not really something you want to have on protected endpoints. This tutorial will teach you how to create authentication in a FastAPI application using JSON Web Tokens. FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3. Include swagger_ui_oauth2_redirect_url and. FastAPI Plugin for reusable JWT Authentication Management. And the spec says that the fields have to be named like that. The authorization server will then return an access token that allows the user to access the API. py and start with this stub of a method (and a class, too): class Auth: @staticmethod def create_token(data: dict, expires_delta: int): pass. See RFC 7519, section 8. This is JWT authentication example with FastAPI . Enjoy. e. FastAPIは、これらのセキュリティ機能を実装するために、抽象度の異なる複数のツールを提供しています。 Copy it and keep it somewhere safe. We will build multiple database entities and learn to develop relationships between different models using multiple databases like SQL Lite, MySQL, PostgreSQL and SQLAlchemy library. I will check in that direction. fastapi-beanie-jwt. FastAPI framework, high performance, easy to learn, fast to code, ready for production. headers. 4k. import models from . Start by setting up your virtual environment and activating it. In this tutorial, you'll learn how to secure a FastAPI app by enabling authentication using JSON Web Tokens (JWTs). Create a new file Auth. from typing import Optional from pydantic import BaseModel, EmailStr class UserCreate (BaseModel): username: str email: EmailStr password: str class ShowUser (BaseModel): username: str email: EmailStr is_active: bool class Config (): orm_mode = True. The second service, Service B, handles authentication and authorization using JWT tokens. In this tutorial we are going to set up the authentication process by protecting our apis using JWT. HTTP Basic Auth Using the Request Directly Using Dataclasses Advanced Middleware Sub Applications - Mounts. py,. The method should work this way: you provide data to encode and time (in seconds) after which the token expires. 1 Answer. def authenticate_user (fake_db: dict, username: str, password: str): user = get_user (fake_db, username) if not user: return False. In this tutorial we are going to set up the authentication process by protecting our apis using JWT. Because the. They should be what they are claiming they are. timedelta, integer, or even boolean and overrides the authjwt_access_token_expires and authjwt_refresh_token_expires settings. /gotrue If you have docker installed. In this video we'll be creating endpoints for user authen. Uses JWT access and refresh tokens. FastAPI Cloud Auth - Simple integration between FastAPI and cloud authentication services (AWS Cognito, Auth0, Firebase Authentication). Here is an example of using access and refresh tokens: from fastapi import FastAPI, HTTPException, Depends, Request from fastapi. py import uvi. If you do need this to work with Swagger UI as well, one solution would be to use FastAPI's HTTPBearer, which would allow you to click on the Authorize button at the top right hand corner of your screen in Swagger UI autodocs (at /docs ), where you can type your API key in the Value field. responses import JSONResponse from fastapi_jwt_auth import AuthJWT from fastapi_jwt_auth. add_route ( "/graphql", GraphQLApp (schema=graphene. Could not load branches. 0:5002For this, use the provided OAuth2PasswordRequestForm, import it and use it as a dependency. FastAPI, a modern, fast, web framework for building APIs with Python 3. com. It uses an async PostgreSQL connection with SqlAlchemy ORM. In the next article, we will implement the auth logic in a FastAPI application. Contribute to BekBrace/fastapi-jwt-auth development by creating an account on GitHub. auth_success = await websocket_auth(websocket=websocket) was a function that used a function from FastAPI-users to validate the jwt token in the cookie. py file as the main file in our application. The same as we were doing before in the path operation directly, our new dependency get_current_user will receive. I use firebase authentication: user input email and password at frontend front sends the info to firebase; firebase auth user and return token; front stores the token; for any url that needs auth, front sends the token in Authorization header (Bearer xxx) server side firebase checks the token; The tutorial shows how to do this with a password:Defaults to ["fastapi-users:auth"]. Let start with the Auth0 part. Technical Details. It’s time to set up our Authentication for React. from fastapi. The secret parameter. We can use this class to extract and parse the token. FastAPI-Azure-Auth implements Azure AD and Azure AD B2C authentication and authorization for your FastAPI APIs and OpenAPI documentation. Split your client fixture into two - one with client and app. We'll start in the backend, developing a RESTful API powered. See example. The reload flag let's uvicorn. JWT token authentication. 1, and I'm experiencing an issue with user authentication, specifically related to JWT tokens. e. Final app: Main dependencies:. FastAPI provides the same starlette. authentication import (AuthenticationBackend, BearerTransport, JWTStrategy,). This takes a datetime. Creating and Using JWT in FastAPI. js library (you can use a more modern alternative if you prefer) Finally, we set the Authorization header for the request; And voila, now requests to our FastAPI endpoints which require user auth are possible. It has a clear and detailed explanation. Switch branches/tags. You can return a stateless JWT instead, with the allowed scopes and expiration. responses import JSONResponse from fastapi_jwt_auth import AuthJWT from. In the simplest case, someone else takes care of acquiring a valid JWT token so that FastAPI then can simply decode and read the user. responses import JSONResponse. The fresh tokens pattern is built into this extension. In this tutorial, we will walk you through the process of integrating JWT (JSON Web Tokens) with FastAPI to secure user authentication. 9+ Python 3. This code sample demonstrates how to implement authentication in a client application built with Svelte and JavaScript, as well as how to implement authorization in an API server built with FastAPI and Python. Sample FastAPI server with JWT auth and Beanie ODM. Defaults to "HS256". js that is dedicated for creating faster and easier universal web apps. Then select the "Edit" button next to "Custom JWT Authentication". FastAPI是一个用Python编写的现代的、快速的、经过战斗检验的、轻量级的web开发框架。这个领域的其他流行选择是Django、Flask 和Bottle。. post ("/login") def login (db: Session = Depends (deps. {"payload":{"allShortcutsEnabled":false,"fileTree":{"tests":{"items":[{"name":"__init__. g. Reason: The Microsoft Entra token isn't valid. Get started with FastAPI JWT authentication – Part 1. OAuth2 with Password (and hashing), Bearer with JWT tokens Middleware CORS (Cross-Origin Resource Sharing) SQL (Relational) Databases. Vue will then cache the received JWT token (or whatever token received) and keep it in a. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Based on FastAPI-Amis-Admin and provides a freely extensible visual management interface. You can also change the expires time for a token via parameter expires_time in the create_access_token () or create_refresh_token () function. It accepts the. from fastapi import FastAPI import jwt from pydantic import BaseModel from fastapi. env. async def websocket_auth ( websocket : WebSocket ): try : cookie = websocket . Azure AD on the other hand supports JWTs out of the box :) You are correct, I am using on-prem AD. This will set the Authorization header in. UvicornWorker api:app --bind=0. from fastapi import FastAPI, Body, Depends, HTTPException, status from fastapi. py app api. In the previous post, we implemented a logic to create JWT tokens. Hence, you should instead use: access_token = request. auth_from: For identity get token from HTTP or WebSocket. FeaturesPart 10: Authentication via JWT Part 11: Dependency Injection and FastAPI Depends Part 12: Setting Up A React Frontend. User sends credentials to the backend via POST and backend will set the JWT to Cookie and send it back. strawberry-jwt-auth. See example. One of the fastest Python frameworks available. We'll be using PyJWT to sign, encode, and decode JWT tokens. How you put it in the header depends on the library you are using to perform HTTP requests. I am trying to create an API for our organization using FastAPI. Add paste this just under app = FastAPI(). 0. 10. I am learning it from past few weeks. But still, FastAPI got quite some inspiration from Requests. Create a logout function to clear the cookie. . Makers of the McAllister and JT2 bagpipe chanter reeds and bagpipe specialists. Secure password hashing by default. Security and Authentication Support: FastAPI provides various authentication mechanisms, including support for JWT, OAuth, and other authentication methods. SQLAlchemy models (independent of Flask extensions, so they can be used with Celery workers directly). What is 422 Unprocessable Entity?. Released: Sep 29, 2023. 8+ Python 3. Useful if you want to dynamically enable some authentication backends based on external logic, like a configuration in database. 8+ non-Annotated. It returns an object of type HTTPBasicCredentials: It contains the username and password sent. 2. Through JWT token we just created, we can create a dependency get_user_from_header to use in some private endpoints; Sebastian Ramirez(Creator of FastAPI) has a great video that shows how you can add a basic auth to your app FastAPI - Basic HTTP Auth. _cookies [ "fastapiusersauth" ] user = await cookie_authentication ( cookie , user_db ) if user and. This will open a new window for configuring the API. HTMX and FastAPI. 3. pip install fastapi-csrf-protect # or poetry add fastapi-csrf-protect Getting Started. In many frameworks and systems just handling security and authentication takes a big amount of effort and code (in. User management; Login APIs; Access Control/Authorization; User. This article will teach you how to add JSON Web Token (JWT) authentication to your FastAPI app using PyMongo, Pydantic, FastAPI JWT Auth package, and Docker-compose. Then on your nextjs app include the bearer token in your authorization header for your requests. How to Setup FastAPI with MongoDB; Starting the FastAPI Server; Set up.