code: func ResponseError(format string, a ...interface{}) {
  	response := ErrorResponse{Error: fmt.Sprintf(format, a...)}
  	j, err := json.MarshalIndent(&response, "", "\t")
  	if err != nil {
  		panic(fmt.Sprintf("Failed to generate response for error:", err))
  	}
  	fmt.Println(string(j[:]))
  }
docs: // ResponseError would generate a error information in JSON format for output