leaky-paywall-doi-email-content.php

<?php

add_filter( 'leaky_paywall_doi_email_message', 'zeen101_doi_email_content', 10, 2 );

function zeen101_doi_email_content( $body, $user ) {

  // add the full name of the user to the double opt in verification email

	$full_name = $user->first_name . ' ' . $user->last_name;
	$content = '<p>Hello, ' . $full_name . '!</p>';

	return $content . $body;
}