code: def authenticate(user=None):  # noqa: E501
      
      if connexion.request.is_json:
          user = UserAuth.from_dict(connexion.request.get_json())  # noqa: E501
      return 'do some magic!'
docs: Authenticate
  
      Authenticate with the API # noqa: E501
  
      :param user: The user authentication object.
      :type user: dict | bytes
  
      :rtype: AuthResponse