How you change it depends on how you sign in to GA4audit - with email and password, or with a Google account.
Email + password accounts
An extra safeguard: the old address receives a notification with the option to revert the change - if someone unauthorized made it, one click restores the previous email (then reset your password immediately).
Google sign-in accounts
The email address is managed by Google and can't be changed in GA4audit (the profile shows the hint "Managed by Google"). Your identity in the app = your Google account.
Want to use a different address? Write to us (contact@ga4audit.io) - we'll suggest the best path for your situation.
Common errors
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