Update XP calculation when leveling up

Author: lulunac27a

app.py

@@ -54,8 +54,12 @@ def check_level_up(self):  # check if user has leveled up
             self.xp >= self.xp_required
         ):  # if user XP is greater than or equal to XP required
             self.xp -= self.xp_required
-            self.xp_required = round(
-                self.xp_required + self.xp_required * 1 / math.sqrt(self.level)
+            self.xp_required = max(
+                1,
+                round(
+                    self.xp_required
+                    + max(1, self.xp_required * 1 / math.sqrt(self.level))
+                ),
             )  # increase XP required exponentially with slower growth at higher levels
             self.level += 1  # increase level