unable to request an API enabled with @requires_auth

[MSA028]

The following is the code I'm using to get token

from utills.config import AppConfigs
import subprocess,os,json,requests
def get_ad_token():
    curl_cmd = [
    "curl",
    "-X","post",
    f"https://login.microsoftonline.com/{AppConfigs.TENANT_ID}/oauth2/v2.0/token",        
    "-d", "grant_type=client_credentials",        
    "-d", f"client_id={AppConfigs.CLIENT_ID}",        
    "-d", f"client_secret={AppConfigs.CLIENT_SECRET}",        
    "-d", f"scope=api://{AppConfigs.CLIENT_ID}/.default"
    ]
    res=subprocess.run(curl_cmd,capture_output=True,text=True)
    access_token = json.loads(res.stdout)
    return access_token["access_token"]

This token I'm passing as Authorization header to api and it's giving an error
IDW10201: No scope or app permission (role) claim was found in the bearer token

Here is API code

    from fastapi import APIRouter,Request
    from fastapi_microsoft_identity import AuthError,requires_auth,validate_scope
    import fastapi
    from fastapi.exceptions import HTTPException
    from pydantic import ValidationError
    from utills.config import AppConfigs
    
    
    poc_router = APIRouter()
    scope = "access_api"
    
    
    @poc_router.get("/add/{num1}/{num2}")
    @requires_auth
    async def add_with_auth(request:Request,num1:int,num2:int):
        try:
            validate_scope(required_scope=scope,request=request)
            return num1+num2
        except AuthError as ae:
            return fastapi.Response(content=ae.error_msg, status_code=ae.status_code)
        except ValidationError as ve:
            return fastapi.Response(content=ve.error_msg, status_code=ve.status_code)
        except Exception as x:
            raise HTTPException(status_code=403,detail=f"Failed with Excetion--{e}")

Please help me how to get proper access token that can be sent to api