Redirect user to the Sign Up page of the New Universal Login when using the Auth0 WordPress Plugin

Knowledge Solutions
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Problem statement

I use the “Login by Auth0” WordPress plugin to authenticate users into my WordPress application. I’m redirecting the users to the New Universal Login page to log in. I need to provide a direct link to the Sign Up page so users can sign up easily.

Solution

By default, if you try to access the “/wp-signup.php” page of the WordPress instance, it will redirect the user to the “wp-login.php” page with the “action=register” query parameter in the URL. (https://YOUR_WP/wp-login.php?action=register).

We can utilize this and the “auth0_authorize_url_params” filter to provide a direct link to the Sign Up page of the Universal Login Page.

For example, you can add the following code to your WordPress theme’s functions.php file.

function set_signup_to_auth0_url_params($params, $connection, $redirect_to) {
	if ($_GET['action'] === 'register') {
		$params['screen_hint'] = 'signup';
	}
	
	return $params;
}

add_filter('auth0_authorize_url_params', 'set_signup_to_auth0_url_params', 10, 3);

After that, visiting the /wp-signup.php URL or /wp-login.php?action=register will redirect the user to the Sign Up view of the Auth0 Universal Login Page.

You can read more about Extending Login by Auth0 WordPress Plugin.