fix case where token may expire

app/controllers/projects/clusters_controller.rb

@@ -171,8 +171,7 @@ class Projects::ClustersController < Projects::ApplicationController
   end
 
   def new_cluster
-    if GoogleApi::CloudPlatform::Client.new(token_in_session, nil)
-      .validate_token(expires_at_in_session)
+    if valid_gcp_token
       @new_cluster = ::Clusters::Cluster.new.tap do |cluster|
         cluster.build_provider_gcp
       end
@@ -185,6 +184,11 @@ class Projects::ClustersController < Projects::ApplicationController
     end
   end
 
+  def valid_gcp_token
+    @valid_gcp_token = GoogleApi::CloudPlatform::Client.new(token_in_session, nil)
+      .validate_token(expires_at_in_session)
+  end
+
   def token_in_session
     @token_in_session ||=
       session[GoogleApi::CloudPlatform::Client.session_key_for_token]

app/views/projects/clusters/new.html.haml

@@ -20,7 +20,7 @@
     .tab-content.gitlab-tab-content
       .tab-pane{ id: 'create-new-cluster-pane', class: active_when(active_tab == 'new'), role: 'tabpanel' }
         = render 'projects/clusters/gcp/header'
-        - if @token_in_session
+        - if @valid_gcp_token
           = render 'projects/clusters/gcp/form'
         - elsif @authorize_url
           = link_to @authorize_url do