create base models(users,tasks)

src/db/database.py

@@ -0,0 +1,15 @@
+from datetime import datetime
+
+from sqlalchemy import TIMESTAMP, func
+from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column
+
+engine = create_async_engine("sqlite+aiosqlite:///src/db/taskncoffee.db", echo=True)
+
+async_session_maker = async_sessionmaker(bind=engine, expire_on_commit=False)
+
+
+class Base(DeclarativeBase):
+    created_at: Mapped[datetime] = mapped_column(
+        TIMESTAMP(timezone=True), server_default=func.now()
+    )