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 # Hints
 
-If you get errors like this
-
+If you get an error like
 ```
-Error: module.cloudsql.google_sql_database_instance.cloudsql: 1 error(s) occurred:
-* module.cloudsql.google_sql_database_instance.cloudsql: key "default" does not exist in map var.sql_instance_size in:
+key "default" does not exist in map var.sql_instance_size in: 
 ${var.sql_instance_size[terraform.workspace]}
-
-Error: module.gke.google_container_cluster.primary: 1 error(s) occurred:
-* module.gke.google_container_cluster.primary: key "default" does not exist in map var.gke_num_nodes in:
-${var.gke_num_nodes[terraform.workspace]}
 ```
 you are still in the default workspace. Change to dev by `terraform workspace select dev` or create it `terraform workspace new dev` if you didn't yet.
 
+***
+If you get an error like
+```
+kubernetes_secret.credentials: Get https://35.198.136.56/api/v1/namespaces/default/secrets/hackmd-credentials: x509: certificate signed by unknown authority
+```
+you need to fetch the credentials for the server. `gcloud init` to select the `development` project, then `gcloud container clusters list` to see the clusters, then `gcloud container clusters get-credentials <CLUSTERNAME> --zone europe-west3-a`
+
 ***
 
 If a resource cannot be found by Terraform and this even prevents a `terraform refresh` with an error like