Created system of authentication plugins

module/Rest/src/Authentication/AuthenticationPluginManagerInterface.php

@@ -0,0 +1,17 @@
+<?php
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Rest\Authentication;
+
+use Psr\Container;
+use Psr\Http\Message\ServerRequestInterface;
+use Shlinkio\Shlink\Rest\Exception\NoAuthenticationException;
+
+interface AuthenticationPluginManagerInterface extends Container\ContainerInterface
+{
+    /**
+     * @throws Container\ContainerExceptionInterface
+     * @throws NoAuthenticationException
+     */
+    public function fromRequest(ServerRequestInterface $request): Plugin\AuthenticationPluginInterface;
+}