Add user update ability

src/models/user.py

@@ -26,7 +26,7 @@ class User(UserBase):
     updated_at: datetime = Field(
         description="Last update timestamp", examples=["2025-01-01T00:00:00.000Z"]
     )
-    
+
     @property
     def has_logged_in(self) -> bool:
         """Returns True if the user has ever logged in, False if last_login is the epoch date."""
@@ -46,9 +46,12 @@ class UserLogin(UserBase):
     password: str = Field(description="Password of the user", examples=["sn1rbul4"])
 
 
-class UserChangePassword(BaseModel):
+class UpdateUser(BaseModel):
     id: int = Field(description="ID of the user", examples=[1])
-    old_password: str = Field(
-        description="Old password of the user", examples=["sn1rbul4"]
+    avatar_id: int | None = Field(None, description="ID of the avatar", examples=[1])
+    email: str | None = Field(
+        None, description="Email of the user", examples=["[email protected]"]
+    )
+    password: str | None = Field(
+        None, description="Password of the user", examples=["p1p4l1"]
     )
-    password: str = Field(description="Password of the user", examples=["p1p4l1"])