docs: def has_auth_params(self, scheme):
          """Check whether all information required for a given auth scheme have
          been supplied.
  
          Args:
            scheme (str): Name of the authentication scheme to check. One of
              Gem-Identify, Gem-Device, Gem-Application
  
          Returns:
            True if all required parameters for the specified scheme are present
            or False otherwise.
          """
          for k, v in iteritems(self.schemes[scheme][u'params']):
              if not v: return False
          return True