Close #15 added two factor authentication

src/User/Validator/TwoFactorCodeValidator.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Da\User\Validator;
+
+use Da\TwoFA\Manager;
+use Da\User\Contracts\ValidatorInterface;
+use Da\User\Model\User;
+
+class TwoFactorCodeValidator implements ValidatorInterface
+{
+    protected $user;
+    protected $code;
+    protected $cycles;
+
+    /**
+     * TwoFactorCodeValidator constructor.
+     *
+     * @param User $user
+     * @param $code
+     * @param int $cycles
+     */
+    public function __construct(User $user, $code, $cycles = 0)
+    {
+        $this->user = $user;
+        $this->code = $code;
+        $this->cycles = $cycles;
+    }
+
+    /**
+     * @return bool|int
+     */
+    public function validate()
+    {
+        $manager = new Manager();
+        return $manager->setCycles($this->cycles)->verify($this->code, $this->user->auth_tf_key);
+    }
+}