--- /dev/null
+<?php
+
+namespace Drupal\migrate_plus;
+
+/**
+ * Defines an interface for authenticaion handlers.
+ *
+ * @see \Drupal\migrate_plus\Annotation\Authentication
+ * @see \Drupal\migrate_plus\AuthenticationPluginBase
+ * @see \Drupal\migrate_plus\AuthenticationPluginManager
+ * @see plugin_api
+ */
+interface AuthenticationPluginInterface {
+
+ /**
+ * Performs authentication, returning any options to be added to the request.
+ *
+ * @return array
+ * Options (such as Authentication headers) to be added to the request.
+ *
+ * @link http://docs.guzzlephp.org/en/latest/request-options.html
+ */
+ public function getAuthenticationOptions();
+
+}