Create autofill functions for users in category and in table. Add function in category class to return a list of all users.

classes/category.py

@@ -128,9 +128,7 @@ class Category:
         else:
             self._scores_map[score.user] = score
 
-        self._scores_map = dict(
-            sorted(self._scores_map.items(), key=lambda x: x[1].value, reverse=not self.ascending)
-        )
+        self._scores_map = dict(sorted(self._scores_map.items(), key=lambda x: x[1].value, reverse=not self.ascending))
 
     def clear(self) -> None:
         """
@@ -139,6 +137,15 @@ class Category:
         """
         self._scores_map.clear()
 
+    def get_users(self) -> "list[str]":
+        """
+        Returns list of users in this category.
+
+        Returns:
+            list[str]: List of all users in category.
+        """
+        return self._scores_map.keys()
+
     def get_user_score(self, user: str) -> Score:
         """
         Gets a user's score. Returns None if user is not found.