feat(): migrate to auth identity

src/template_project/adapters/data_gateways/user.py

@@ -1,6 +1,6 @@
-from typing import cast, override
+from typing import override
 
-from sqlalchemy import exists, select
+from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from template_project.adapters.data_gateways.tables import user_table
@@ -17,12 +17,3 @@ class DefaultUserDataGateway(UserDataGateway):
         statement = select(User).where(user_table.c.id == id_)
         result = await self._session.execute(statement)
         return result.scalar_one_or_none()
-
-    @override
-    async def exists_by_email(self, email: str) -> bool:
-        statement = select(exists(select(user_table).where(user_table.c.email == email)))
-        result = await self._session.execute(statement)
-        result_fetchone = result.fetchone()
-        if result_fetchone is None:
-            return False
-        return cast(bool, result_fetchone[0])