How do I open a token account?

Open the Token tab on /signup and your token is already waiting, in the form cox_XXXXX-XXXXX-XXXXX-XXXXX-XXXXX.

Copy it or save it as a .txt file, then tick "I saved it" and the terms box. That is the whole sign-up, with no email, name or phone number. The token is your only key, so losing it means losing the account.