Pianta HQ
Pianta HQ allows you to register and manage your personal account (including adding and verifying email addresses), and your organisation's billing, members and workspaces.
From time to time, when you try to access a workspace, it will authenticate with Pianta HQ. This means that you only need to worry about a single account at Pianta, and Pianta can take care of ensuring that account has secure access to your various workspaces.