code: def assert_has_permission(self, scope_required):
          
          if not self.authenticated:
              raise ValueError("Must first authenticate()")
  
          if scope_required not in self.get_scopes():
              logging.warning("Authenticated as %s" % (self.client['id']))
              logging.warning("Have scopes: %s" % (str.join(',', self.get_scopes())))
              logging.warning("Insufficient scope %s for operation" % (scope_required))
  
              raise ValueError("Client does not have permission.")
  
          return True
docs: Warn that the required scope is not found in the scopes
          granted to the currently authenticated user.
  
          ::
  
              # The admin user should have client admin permissions
              uaa.assert_has_permission('admin', 'clients.admin')