Backend finished

Co-authored-by: Álvaro <alvaro6gv@users.noreply.github.com>

backend/app/models/user.py

@@ -0,0 +1,10 @@
+from sqlalchemy import Column, Integer, String, Boolean
+from app.db.database import Base
+
+class UserModel(Base):
+    __tablename__ = "users"
+    user_id = Column(Integer, primary_key=True, autoincrement=True)
+    user_name = Column(String(64), unique=True, nullable=False)
+    password = Column(String(256), nullable=False)
+    totp_secret = Column(String(32), nullable=True)
+    has_2fa = Column(Boolean(False), default=False, nullable=False)