Added PasswordGrantProvider

src/ServiceProviders/PasswordGrantProvider.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace League\OAuth2\Server\ServiceProviders;
+
+use League\Container\ServiceProvider;
+use League\OAuth2\Server\Grant\PasswordGrant;
+
+class PasswordGrantProvider extends ServiceProvider
+{
+    protected $provides = ['PasswordGrant'];
+
+    /**
+     * @inheritdoc
+     */
+    public function register()
+    {
+        $container = $this->getContainer();
+
+        $container->add('PasswordGrant', function () use ($container) {
+
+            $refreshTokenRepository = null;
+            if ($container->isRegistered('RefreshTokenRepository')) {
+                $refreshTokenRepository = $container->get('RefreshTokenRepository');
+            }
+
+            $grant = new PasswordGrant(
+                $container->get('emitter'),
+                $container->get('ClientRepository'),
+                $container->get('ScopeRepository'),
+                $container->get('AccessTokenRepository'),
+                $container->get('UserRepository'),
+                $refreshTokenRepository
+            );
+            return $grant;
+        });
+    }
+}