To prevent needless storage of personal data about our users, a user profile that has not been used at all within 14 days of creation will be deleted. The user will be notified by email after the fact. Usage includes accepting any invitation, creating or requesting a collaboration, and applying for membership of a collaboration.
Without any user action, the profile only contains information provided by the IdP, so logging in again restores the profile with all relevant properties, except for SSH keys.