The following docs are tagged with

Title Summary
Account Login, Password Reset, & Lockout Issues If you’re having trouble logging into your Stitch account, this is the place to start.
Adding Team Members to Multiple Accounts While Stitch currently allows a single email address to be associated with one account, there is a simple workaround.
Billing FAQ Learn how to manage and change your Stitch subscription plan, enter payment details, view invoices, and cancel your account.