A FastAPI example for auth using Authorization header

fastapi_app.py

import os
import secrets

from fastapi import FastAPI, Security, HTTPException, status, Depends
from starlette.responses import JSONResponse
from fastapi.security.api_key import APIKeyHeader, APIKey


auth_header = APIKeyHeader(name="Authorization", auto_error=False)

async def get_auth(auth_header: str = Security(auth_header)):
    auth_comp = auth_header.split(' ') if auth_header else None
    if len(auth_comp) == 2:
         if auth_comp[0].lower() == "token":
            return secrets.compare_digest(os.getenv("TOKEN").encode('utf-8'), auth_comp[0].lower().encode('utf-8'))
        
    raise HTTPException(status_code=status.HTTP_403_FORBIDDEN,
                            detail="Invalid credentials",
                            headers={"WWW-Authenticate": "Token"})

app = FastAPI()

@app.get("/hello")
def hello(api_key: APIKey = Depends(get_auth)):
    return JSONResponse(content={"message": "Hello"}, status_code=status.HTTP_200_OK, 
                        media_type="application/json")

Going to give this a try!