feat: add WEBUI_AUTH_TRUSTED_EMAIL_HEADER for authenticating users by a trusted header

This is very yolo code, use at your own risk

backend/apps/web/models/auths.py

@@ -122,6 +122,17 @@ class AuthsTable:
         except:
             return None
 
+    def authenticate_user_by_trusted_header(self,
+                                            email: str) -> Optional[UserModel]:
+        log.info(f"authenticate_user_by_trusted_header: {email}")
+        try:
+            auth = Auth.get(Auth.email == email, Auth.active == True)
+            if auth:
+                user = Users.get_user_by_id(auth.id)
+                return user
+        except:
+            return None
+
     def update_user_password_by_id(self, id: str, new_password: str) -> bool:
         try:
             query = Auth.update(password=new_password).where(Auth.id == id)