Handle Declined Authorization Permissions
When your users are authorizing your application, some providers (such as Facebook) allow the user to select the attributes they wish to share.
By default, this selection is made only when the user authorizes the app for the first time. If your user chooses to not allow certain attributes (such as their email) that are required by your application, the user will not be able to access your application.
In such instances, your user will need to be re-prompted to grant permission to the required attribute(s) to login.
Re-prompt for permissions
By setting the prompt=consent parameter when calling the /authorize endpoint of the Authorization API, your user will be prompted again to grant permissions for your application.
This parameter can also be set using Lock as an Authentication Parameter with prompt: 'consent'.
Alternatively, you can set this with Auth0.js using prompt: 'consent'.