Should have handled username updating code in the command, didn't need to create new functions for the command.

cogs/commands/data_management.py

@@ -65,7 +65,8 @@ class DataManagementCog(commands.Cog, name="Table Management"):
         ),
     ):
         """
-        _summary_
+        Creates a request to send to admins for changing a username. Uses
+        UpdateUsernameVerifyView to do the work.
 
         Args:
             interaction (nextcord.Interaction): Interaction that invoked the command

cogs/commands/views/update_username_verify.py

@@ -54,20 +54,20 @@ class UpdateUsernameVerifyView(nextcord.ui.View):
         content += f"\nApproved by <@{interaction.user.id}>."
         await interaction.edit(content=content, view=None)
 
-        tables = guild.update_username(old_username, new_username)
+        # update username in all tables and categories
+        for table in guild.tables:
+            table_updated: bool = False
+            for category in table.categories:
+                score = category.remove_score(old_username)
+                if score:
+                    # score exists
+                    score.user = new_username
+                    category.add_score(score)
+                    table_updated = True
 
-        # if no tables updated, send informing message and return.
-        if len(tables) == 0:
-            await interaction.send(
-                f'Username "{old_username}" not found. Have user try again with valid username.',
-                ephemeral=True,
-            )
-            return
-
-        # update all table messages
-        for table in tables:
-            await send_highscore_message(
-                interaction.guild.get_channel(guild.highscore_channel), guild, table
-            )
+            if table_updated:
+                await send_highscore_message(
+                    interaction.guild.get_channel(guild.highscore_channel), guild, table
+                )
 
         highscores_data.save_guild_data(guild)