Some questions about login & user OAuth

[ecmadao]

一定要通过用户名和密码来登录吗？
我登录之后没有获取到任何数据，与我开启了 GitHub 的两步认证有关吗？
可否让用户选择通过 GitHub OAuth 认证登录？我觉得哪怕这样的话权限不够，缺少一些功能也是可以接受的。

[hackjutsu]

Same as #16.

I prefer GitHub OAuth integration over username && password, since it provides a clearer picture about within what scopes the app would handle my data. On the other hand, users are able to manage their tokens in their GitHub setting page.

Anyway, thanks for this nice app.