[企划] 做一个玩家账户系统 注册/好友/在线时长

想做一个玩家账户系统，看着注册用户慢慢增长 会是一种什么样的体验？
启发: https://phira.moe/user

discord oauth

```
User:
id: i32,  // autoinc
name: String,
email: String,
password_digest: String,
description: String,
language: Enum,


time_registered: Timestamp,
// time_last_login: Timestamp,


Login:
id, 
user_id,
ip,
time,
keepalive_timelen:

Follow:
id,
src_user_id,
dst_user_id,


```