Add user model

app/models.py

@@ -0,0 +1,9 @@
+from werkzeug.security import generate_password_hash, check_password_hash
+
+
+class User(db.Model):
+    def set_password(self, password):
+        self.password_hash = generate_password_hash(password)
+
+    def check_password(self, password):
+        return check_password_hash(self.password_hash, password)