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How to support multiple emails with one user account with the same credentials?


Hello there,
our legacy product has a feature where user could associate multiple emails with their user account . We also support the notion of the primary email that is used to send notifications to the user. User can log in with either of the emails with identical credentials.

We are migrating to Auth0 and would like to continue supporting this feature without creating additional user accounts in our application.

We are using Auth0 Lock to signup/login. We migrated our primary emails to Auth0 and users can log in with their primary email but not with other emails associated to their account.

Do you have a suggestion on how we could achieve our legacy functionality?

Thank you for your help,