Unable to call the Authenticated Cloudfunctions (.NET) on Cloud Run .NET Application

[Jiji_Biju]

I want to run the authenticated .net cloudfunction on .net aplication . I have applied  all possible solution , That is I have access the bearer token using service account key .json and passed to HTTPclient header . I can access the token ,But still getting 401.  ( Error: Response status code does not indicate success: 401 (Unauthorized) .   I have given required  permissions for the task  . Also When I run same cloudfunction url and access token on postman , getting same 401 error