To delete the account you need to go the app’s my profile page.
In the more options page which can be accessed via clicking on the last icon in bottom navigation bar, you will see an option to delete the profile when you are already logged in to the app.
Tap on delete profile
This will open a popup with warning that deletion is permanent and all data related to your ID and other data will be deleted once you go ahead with it. Press delete button to delete your profile and all the data regarding it.