Apparently it can be done in your browser. It doesn't tell about doing it in the Android or Ipad app and they didn't make a special delete-account-app, but - luckily - your phone and tablet have a browser also.
As shown in the title,
I've searched HIGH AND LOW on that app and yet to.avail,
are there really no such options?
Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic