Reapply "Merge branch 'main' of https://github.com/GooGuTeam/osu_lazer_api"

This reverts commit 68701dbb1d.

app/models/oauth.py

@@ -0,0 +1,29 @@
+# OAuth 相关模型
+from __future__ import annotations
+
+from pydantic import BaseModel
+
+
+class TokenRequest(BaseModel):
+    grant_type: str
+    username: str | None = None
+    password: str | None = None
+    refresh_token: str | None = None
+    client_id: str
+    client_secret: str
+    scope: str = "*"
+
+
+class TokenResponse(BaseModel):
+    access_token: str
+    token_type: str = "Bearer"
+    expires_in: int
+    refresh_token: str
+    scope: str = "*"
+
+
+class UserCreate(BaseModel):
+    username: str
+    password: str
+    email: str
+    country_code: str = "CN"