添加Github登录，优化数据库模型

models/request.py

@@ -0,0 +1,17 @@
+"""
+请求模型定义
+"""
+
+from pydantic import BaseModel, Field
+from typing import Literal, Union, Optional
+from datetime import datetime, timezone
+from uuid import uuid4
+
+class LoginRequest(BaseModel):
+    """
+    登录请求模型
+    """
+    username: str = Field(..., description="用户名或邮箱")
+    password: str = Field(..., description="用户密码")
+    captcha: Optional[str] = Field(None, description="验证码")
+    twoFaCode: Optional[str] = Field(None, description="两步验证代码")