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.
 	 */

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('