#6 Created route to enroll student into a course

backend/app/models.py

@@ -42,6 +42,7 @@ class User(UserMixin, db.Model):
     def enroll(self, c) -> bool:
         if not self.is_enrolled(c):
             self.enrolled_courses.append(c)
+            db.session.commit()
             return True
         return False