Initial import from Alltube app

Removed dependency on Config and LocaleManager classes
Avoid using generic exceptions

classes/exceptions/WrongPasswordException.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Alltube\Library\Exception;
+
+/**
+ * Wrong password.
+ */
+class WrongPasswordException extends AlltubeLibraryException
+{
+    /**
+     * @var string Error message.
+     */
+    protected $message = 'Wrong password.';
+}