what im doing is letting the user choose his name when the he opens the app, and the leaderboard updates after every game with the highscore. how can i make it so that the user cant choose a name that already exists in the leaderboard? For example lets say he decides on "Bot" and that name already is in the leaderboard, i want it to say "Username already exists choose another" or something.
UPDATE:
took a while but i fixed it!
Love this leaderboard thank you for your work!!