code: def update(attributes)
        attributes.each do |key, value|
          self[key] = value
        end
  
        begin
          resource_gateway.update(id, attributes)
        rescue RestClient::Exception => e
          raise_failed_request_error(e)
        end
  
        self
      end
docs: Update the attributes of this model. Assign the attributes
   according to the hash, then persist those changes on the server.
  
   @param [Hash] attributes the attributes to be updated on the model.
  
   @example
     my_profile.update(
       middle_name: "Ludwig"
     )
  
   @raise [FailedRequestError] if the request failed for any reason.
  
   @return [Model] the updated model.