feat: first commit, auth

db/session.py

@@ -0,0 +1,11 @@
+from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine
+
+from config import cfg
+
+engine = create_async_engine(cfg.db_url, echo=True)
+async_session = async_sessionmaker(bind=engine, expire_on_commit=False)
+
+
+async def get_db():
+    async with async_session() as session:
+        yield session