Oopsy. If you actually really deleted your account by tapping Remove account permantently from your settings, I'm afraid there is nothing we can do to recover it.
If you didn't tap that button but still lost all your sessions; There is a good change that you accidentally created a second account and that your original account is still out there.
In that case, please reach out to us sharing your Username and possible email addresses, and we'll be happy to assist.