fix: add one more enum case

README.md

@@ -3,12 +3,11 @@
 [![Latest Stable Version](https://img.shields.io/github/v/release/brokeyourbike/uba-api-client-php)](https://github.com/brokeyourbike/uba-api-client-php/releases)
 [![Total Downloads](https://poser.pugx.org/brokeyourbike/uba-api-client/downloads)](https://packagist.org/packages/brokeyourbike/uba-api-client)
 [![License: MPL-2.0](https://img.shields.io/badge/license-MPL--2.0-purple.svg)](https://github.com/brokeyourbike/uba-api-client-php/blob/main/LICENSE)
-
+[![tests](https://github.com/brokeyourbike/uba-api-client-php/actions/workflows/tests.yml/badge.svg)](https://github.com/brokeyourbike/uba-api-client-php/actions/workflows/tests.yml)
 [![Maintainability](https://api.codeclimate.com/v1/badges/a64835e6f2c49e1da492/maintainability)](https://codeclimate.com/github/brokeyourbike/uba-api-client-php/maintainability)
 [![Test Coverage](https://api.codeclimate.com/v1/badges/a64835e6f2c49e1da492/test_coverage)](https://codeclimate.com/github/brokeyourbike/uba-api-client-php/test_coverage)
-[![tests](https://github.com/brokeyourbike/uba-api-client-php/actions/workflows/tests.yml/badge.svg)](https://github.com/brokeyourbike/uba-api-client-php/actions/workflows/tests.yml)
 
-First City Monument Bank API Client for PHP
+United Bank for Africa API Client for PHP
 
 ## Installation
 
@@ -25,5 +24,9 @@ $apiClient = new Client($config, $httpClient, $psrCache);
 $apiClient->fetchAuthTokenRaw();
 ```
 
+## Authors
+
+- [Ivan Stasiuk](https://stasi.uk)
+
 ## License
 [Mozilla Public License v2.0](https://github.com/brokeyourbike/uba-api-client-php/blob/main/LICENSE)

src/Enums/ErrorCodeEnum.php

@@ -205,4 +205,9 @@ enum ErrorCodeEnum: string
      * Invalid credentials.
      */
     case INVALID_CREDENTIALS = '999';
+
+    /**
+     * System malfunction.
+     */
+    case SYSTEM_MALFUNCTION = '909';
 }