Authentication: replace getUserId with Member::fromEmailAddress

models/Authentication.php

@@ -73,22 +73,6 @@ class Authentication
 		return $hash;
 	}
 
-	/**
-	 * Finds the user id belonging to a certain emailaddress.
-	 */
-	public static function getUserId($emailaddress)
-	{
-		$res = Registry::get('db')->queryValue('
-			SELECT id_user
-			FROM users
-			WHERE emailaddress = {string:emailaddress}',
-			[
-				'emailaddress' => $emailaddress,
-			]);
-
-		return empty($res) ? false : $res;
-	}
-
 	/**
 	 * Verifies whether the user is currently logged in.
 	 */