Added auth user and key check back

runner_scripts/root/config.sh

@@ -2,6 +2,9 @@
 set -euf -o pipefail
 shopt -s inherit_errexit
 
+: "${CUSTOM_ENV_AUTH_USER:?"AUTH_USER CI/CD variable has not been set."}"
+: "${CUSTOM_ENV_AUTH_KEY:?"AUTH_KEY secret CI/CD variable has not been set."}"
+
 AUTH_USER_WORK=$(runuser "$AUTH_USER" --login --command "echo \$WORK")
 
 : "${AUTH_USER_WORK:?"Could not determine $AUTH_USER's \$WORK directory."}"