Assistance Needed: Correcting Username Error on SongPop2

I trust this message finds you in good spirits. I'm reaching out to kindly request your assistance. Regrettably, I made an error in setting my username on SongPop2 as "michelin star restaurants helsinki" instead of "briansmith." I'm seeking advice on rectifying this mistake. If any of you have insights or experience regarding changing usernames on SongPop2, I would greatly appreciate your help.