Add models.py

models.py

@@ -0,0 +1,9 @@
+from db import Base
+from sqlalchemy import Column, Integer, String
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(Integer, primary_key=True, index=True)
+    username = Column(String(50), unique=True, nullable=False)
+    email = Column(String(100), unique=True, nullable=False)