Merge branch 'master' of https://repo.cimeyclust.com/CimeyClust/HabitTracker

models/HabitList.py

@@ -62,7 +62,10 @@ class HabitList:
     # Adds a User by email to the HabitList
     def add_user(self, email: str):
         user = User.get_by_email(email)
+        if user:
             add_user(self.id, user.id)
+        else:
+            return None
 
 
     # Removes a User from the HabitList