golang_api_sample Qiitaの記事 https://qiita.com/zakiry/private/728872598c546eefb4df sample request $ curl -X POST -H "Content-Type: application/json" -d '{"id": 2}' "localhost:3000/twirp/sample_proto.UserService/GetUser" {"id":"2","name":"piyo piyo","age":30}