code: def retrieve(self, id) :
          
  
          _, _, user = self.http_client.get("/users/{id}".format(id=id))
          return user
docs: Retrieve a single user
  
          Returns a single user according to the unique user ID provided
          If the specified user does not exist, this query returns an error
  
          :calls: ``get /users/{id}``
          :param int id: Unique identifier of a User.
          :return: Dictionary that support attriubte-style access and represent User resource.
          :rtype: dict