Your account and data
On the Account page you can download your data as a JSON file (account, apps, listings, the list of your screenshots and build history; Apple keys are never included).
You can also delete your account there by typing your email to confirm. Your Apple keys and sign-ins are removed at once and your plan is canceled. Everything else is erased after 30 days. Apps already in the App Store stay in your Apple account; Ambient Apps doesn't remove them.
You can sign in with Apple, Google, GitHub or Facebook.
Still stuck?
Ask the help chat, which answers from these guides.
Email support is answered within 2 business days. The support address is being set up; until then, use the help chat.