Issue #3352191: Add a setCredentials() method to `Rest/OpenStackService.php`

modules/cloud_service_providers/openstack/src/Service/Rest/OpenStackService.php

@@ -230,6 +230,16 @@ class OpenStackService extends CloudServiceBase implements OpenStackServiceInter
     return $this->credentials;
   }
 
+  /**
+   * Set the credential array.
+   *
+   * Gives implementing code a chance to set credentials without setting up
+   * a OpenStack cloud service provider.
+   */
+  public function setCredentials(array $credentials): void {
+    $this->credentials = $credentials;
+  }
+
   /**
    * Setup any default parameters for the Guzzle request.
    *