Login User 用户登录

POST /v1/platform/user/login

• =》

{ 
  "username": "xxx", //必填, 用户名为用户输入的email或mobile
  "password": "xxx" //必填
}

• 《=

{
  "success": "OK",
  "data": {
    "token": "xxx.xxx.xxx.xxx"
  }
}