I add missing instruction for GCP.
diff --git a/content/en_setup_gcp.php b/content/en_setup_gcp.php
index f646338..b54d438 100644
--- a/content/en_setup_gcp.php
+++ b/content/en_setup_gcp.php
@@ -95,7 +95,8 @@
The terraform user is then used to run these terraform templates.</p>
<pre class="content">
-If you don’t have credentials for the terraform user, follow these steps:
+If you don’t have credentials for the terraform user, first install <a href="https://cloud.google.com/sdk/install" target="_blank">gcloud</a>
+ and then follow these steps:
1. Create a service account with the "terraform-user" name:
> gcloud iam service-accounts create terraform-user