3.5 用户相关API

{
  "code": 200,
  "message": "成功",
  "data": {
    "id": "user_123",
    "username": "admin",
    "email": "admin@example.com",
    "created_at": "2024-01-01 00:00:00"
  }
}

{
  "code": 200,
  "message": "成功",
  "data": {
    "success": true
  }
}