SecretsManager Client (#1036)

* [SecretsManager] Create service with tests

* [Core] Add factory for SecretsManager

* Make SecretsManager test work when running all tests

* [SecretsManager] Add docs

* [SecretsManager] Code style fix

* Update psalm baseline to include SecretsManager

Author: sunkan

src/AwsClientFactory.php

@@ -24,6 +24,7 @@
 use AsyncAws\Rekognition\RekognitionClient;
 use AsyncAws\Route53\Route53Client;
 use AsyncAws\S3\S3Client;
+use AsyncAws\SecretsManager\SecretsManagerClient;
 use AsyncAws\Ses\SesClient;
 use AsyncAws\Sns\SnsClient;
 use AsyncAws\Sqs\SqsClient;
@@ -251,6 +252,19 @@ public function s3(): S3Client
         return $this->serviceCache[__METHOD__];
     }
 
+    public function secretsManager(): SecretsManagerClient
+    {
+        if (!class_exists(SecretsManagerClient::class)) {
+            throw MissingDependency::create('async-aws/secret-manager', 'SecretsManager');
+        }
+
+        if (!isset($this->serviceCache[__METHOD__])) {
+            $this->serviceCache[__METHOD__] = new SecretsManagerClient($this->configuration, $this->credentialProvider, $this->httpClient, $this->logger);
+        }
+
+        return $this->serviceCache[__METHOD__];
+    }
+
     public function ses(): SesClient
     {
         if (!class_exists(SesClient::class)) {