Hi @bill.white,
Thanks for reaching out to the Auth0 Community!
I understand that you’d like to configure your Passwordless Email authentication to use a code instead of a link.
Unfortunately, you will not be able to avoid customizing the Universal Login Page.
To accomplish this, you can define the passwordlessMethod to be code in your Universal Login Page. See below for an example:
var lock = new Auth0LockPasswordless(config.clientID, config.auth0Domain, {
passwordlessMethod: 'code',
...
});
After doing so, your app will be using the passwordless code method without implementing any external Actions.
Our documentation here goes into more depth on the Passwordless options: https://auth0.com/docs/libraries/lock#passwordless-options
Since you inquired about specifically not customizing the ULP, could you clarify why that may be required?
If applicable, note that it is possible to render the ULP page conditionally based on the clientID. Therefore, you could implement this logic specifically for your Native App.
Looking forward to hearing from you.
Thank you.