Need help making this rule in actions

[curator]

Hi, I found this post a few years ago.

I cannot get the Username field from the database

Hi @fidel.torres , welcome to the community! Do you mean in an ID token? As there isn’t a username claim in the standard spec, and Auth0 does not automatically map to the OIDC claim of preferred_username you would need to map the username via a rule, for example: function (user, context, callback) { user.preferred_username = user.username; //map username to OIDC standard claim return callback(null, user, context); } This would allow you to return the username via the profile scope. Alter…

It was the problem is what I was running into and this rule solved it. The problem is rules are going away and I can’t figure out how to convert it from the rule listed into an action. My feeble attempts have so far failed to net the same result.

Does anyone know how to take this rule:

function (user, context, callback) {
user.preferred_username = user.username;
return callback(null, user, context);
}

And make it an equally functional action that map to the OIDC claim of preferred_username to the username?

Any help is appreciated thanks

[curator]

Well I think between me and an AI bot were able to come up with this after some creative prompting. After a few tests I am pretty sure it’s working as the old rule did.

So I’ll put it here for anyone else who finds the old rule post and is wondering how to do it in new actions.

exports.onExecutePostLogin = async (event, api) => {
// Set the preferred_username in the ID token
api.idToken.setCustomClaim(“preferred_username”, event.user.username);
};