Add method to check if the user has leveled up from earning XP

app.py

@@ -30,6 +30,9 @@ def add_xp(self, amount):  # add XP
         """
         self.xp += amount  # add XP by amount
         self.total_xp += amount  # add total XP by amount
+        self.check_level_up()  # check if user has leveled up
+
+    def check_level_up(self):  # check if user has leveled up
         while (
             self.xp >= self.xp_required
         ):  # if user XP is greater than or equal to XP required