Refactor code structure for improved readability and maintainability

app/models/user.py

@@ -0,0 +1,32 @@
+from datetime import datetime
+from typing import TYPE_CHECKING
+
+from sqlmodel import Field, Relationship
+
+from app.models.base import BaseModel
+
+if TYPE_CHECKING:
+    from app.models.plan import Plan
+    from app.models.playlist import Playlist
+    from app.models.user_oauth import UserOauth
+
+
+class User(BaseModel, table=True):
+    """Database model for a user."""
+
+    plan_id: int = Field(foreign_key="plan.id")
+    role: str = Field(nullable=False, default="user")
+    email: str = Field(unique=True, nullable=False)
+    name: str = Field(nullable=False)
+    picture: str | None = Field(default=None)
+    password_hash: str | None = Field(default=None)
+    is_active: bool = Field(nullable=False, default=True)
+    credits: int = Field(default=0, ge=0, nullable=False)
+    api_token: str | None = Field(unique=True, default=None)
+    api_token_expires_at: datetime | None = Field(default=None)
+
+
+    # relationships
+    oauths: list["UserOauth"] = Relationship(back_populates="user")
+    plan: "Plan" = Relationship(back_populates="users")
+    playlists: list["Playlist"] = Relationship(back_populates="user")