Authentication: replace getUserId with Member::fromEmailAddress

models/Member.php

@@ -8,7 +8,7 @@
 
 class Member extends User
 {
-	private function __construct($data)
+	private function __construct($data = [])
 	{
 		foreach ($data as $key => $value)
 			$this->$key = $value;
@@ -18,6 +18,15 @@ class Member extends User
 		$this->is_admin = $this->is_admin == 1;
 	}
 
+	public static function fromEmailAddress($email_address)
+	{
+		return Registry::get('db')->queryObject(static::class, '
+			SELECT *
+			FROM users
+			WHERE emailaddress = {string:email_address}',
+			['email_address' => $email_address]);
+	}
+
 	public static function fromId($id_user)
 	{
 		$row = Registry::get('db')->queryAssoc('