first commit

db/base.py

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+from sqlalchemy.orm import DeclarativeBase
+
+
+class Base(DeclarativeBase): ...

db/models/__init__.py

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+from .users import User
+
+__all__ = ["User"]

db/models/users.py

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+from sqlalchemy import BIGINT
+from sqlalchemy.orm import Mapped, mapped_column
+
+from db.base import Base
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id: Mapped[int] = mapped_column(
+        BIGINT, nullable=False, unique=True, primary_key=True
+    )
+    support_thread_id: Mapped[int] = mapped_column(BIGINT, nullable=True, unique=True)
+    referal_id: Mapped[int] = mapped_column(BIGINT, nullable=True)

db/session.py

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+from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker
+
+from config import settings
+
+engine = create_async_engine(settings.postgres_url, echo=True)
+async_session = async_sessionmaker(bind=engine, expire_on_commit=False)