Various changes to support the removed old code.

app/lib/FireflyIII/Shared/Mail/RegistrationInterface.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace FireflyIII\Shared\Mail;
+
+/**
+ * Interface RegistrationInterface
+ *
+ * @package FireflyIII\Shared\Mail
+ */
+interface RegistrationInterface
+{
+
+    /**
+     * @param \User $user
+     *
+     * @return mixed
+     */
+    public function sendVerificationMail(\User $user);
+
+    /**
+     * @param \User $user
+     *
+     * @return mixed
+     */
+    public function sendPasswordMail(\User $user);
+
+    /**
+     * @param \User $user
+     *
+     * @return mixed
+     */
+    public function sendResetVerification(\User $user);
+
+}