code: def validate_authorization_request(self, uri, http_method='GET', body=None,
                                         headers=None):
          
          request = Request(
              uri, http_method=http_method, body=body, headers=headers)
  
          request.scopes = utils.scope_to_list(request.scope)
  
          response_type_handler = self.response_types.get(
              request.response_type, self.default_response_type_handler)
          return response_type_handler.validate_authorization_request(request)
docs: Extract response_type and route to the designated handler.