Here are the steps to delete account from the app for mobile devices, which was developed by Kamegiwa.
Launch the app and log in.
Tap "Other" from the bottom menu and open "Settings".
If you have a subscription, tap "Subscription" and select "Cancel" to cancel.
You can't delete account if you have a subscription.
Tap "Delete Account" at the bottom of "Settings".
Tap "Delete".
If you have linked Unity Player Acconts to the app, please delete it from the link below.
Unity Player Accounts Support
If you have any questions, please contact us via email at kmgwspprt[at]gmail.com.