patch fix for empty alt domain

--- lib/private/User/Manager.php	2023-02-03 17:18:44.729561986 +0530

--- ./lib/private/User/Manager.php	2023-02-03 17:18:44.729561986 +0530

+++ lib/private/User/Manager-new.php	2023-02-03 18:00:50.509563655 +0530

+++ ./lib/private/User/Manager-new.php	2023-02-09 17:37:59.809738289 +0530

@@ -705,6 +705,18 @@

@@ -705,6 +705,20 @@

 	 * @since 9.1.0

 	 * @since 9.1.0

 	 */

 	 */

 	public function getByEmail($email) {

 	public function getByEmail($email) {

+		$uid=$email; // get first part of email if it contains alt domain, otherwise it is just $email

+		$uid=$email; // get first part of email if it contains alt domain, otherwise it is just $email

+		$alt_domain = $this->config->getSystemValue('alt_mail_domain', '');

+		$alt_domain = $this->config->getSystemValue('alt_mail_domain', '');

+		if (isset($alt_domain)) {

+			$alt_domain_suffix = !empty($alt_domain) ? '@'  . $alt_domain : '';

+			$alt_domain_suffix = !empty($alt_domain) ? '@'  . $alt_domain : '';

+

+

+			if (stristr($email, $alt_domain_suffix) !== FALSE) {

+			if (stristr($email, $alt_domain_suffix) !== FALSE) {

+			if ($this->get($uid)) {

+			if ($this->get($uid)) {

+				return([$this->get($uid)]);

+				return([$this->get($uid)]);

+			}

+			}

+		}

+

+

 		// looking for 'email' only (and not primary_mail) is intentional

 		// looking for 'email' only (and not primary_mail) is intentional

 		$userIds = $this->config->getUsersForUserValueCaseInsensitive('settings', 'email', $email);

 		$userIds = $this->config->getUsersForUserValueCaseInsensitive('settings', 'email', $email);