Disable sign up via console

scripts/review_apps/review-apps.sh

@@ -127,13 +127,12 @@ function disable_sign_ups() {
   fi
 
   # Create the root token
-  local ruby_cmd="token = User.find_by_username('root').personal_access_tokens.create(scopes: [:api], name: 'Token to disable sign-ups'); token.set_token('${REVIEW_APPS_ROOT_TOKEN}'); begin; token.save!; rescue(ActiveRecord::RecordNotUnique); end"
-  retry "run_task \"${ruby_cmd}\""
+  local set_token_rb="token = User.find_by_username('root').personal_access_tokens.create(scopes: [:api], name: 'Token to disable sign-ups'); token.set_token('${REVIEW_APPS_ROOT_TOKEN}'); begin; token.save!; rescue(ActiveRecord::RecordNotUnique); end"
+  retry "run_task \"${set_token_rb}\""
 
   # Disable sign-ups
-  local signup_enabled=$(retry 'curl --silent --show-error --request PUT --header "PRIVATE-TOKEN: ${REVIEW_APPS_ROOT_TOKEN}" "${CI_ENVIRONMENT_URL}/api/v4/application/settings?signup_enabled=false" | jq ".signup_enabled"')
-
-  if [[ "${signup_enabled}" == "false" ]]; then
+  local disable_signup_rb="Gitlab::CurrentSettings.current_application_settings.update!(signup_enabled: false)"
+  if (retry "run_task \"${disable_signup_rb}\""); then
     echoinfo "Sign-ups have been disabled successfully."
   else
     echoerr "Sign-ups are still enabled!"