Our user database is hosted by Auth0 ([login to view URL]), an OAuth ID provider, which already has a login/register page for users.
As the Meteor app we want to use ([login to view URL]) already handles login and registration for new users, we need to integrate user creation/update with an external service, Auth0. For that, the package [login to view URL] needs to be used, which means almost the entire flow is already implemented already, only a few tweaks are needed.
Basically, the user should click on the user login icon (top right), click "Login with Auth0", a redirection to Auth0 login page occurs, and after signing in, the Meteor app is called and the returned information should be stored in the Meteor app database and the correct information should be shown on the profile card, non-editable.
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