gcloud sql backups restore 1504554300110 --restore-instance=[MY-DB-INSTANCE]

ERROR: (gcloud.sql.backups.restore) HTTPError 503: Service temporarily unavailable.

gcloud sql backups restore [BACKUP_ID] --restore-instance=[INSTANCE_NAME]

gcloud sql backups restore [BACKUP_ID] --restore-instance=[TARGET_INSTANCE_NAME]
                                      --backup-instance=[SOURCE_INSTANCE_NAME]

gcloud sql backups list --instance [INSTANCE_NAME]

echo "Getting Access Token"
ACCESS_TOKEN="$(gcloud auth print-access-token)"

echo "List available backups for the instance [INSTANCE_NAME] in [PROJECT_ID]"
curl --header "Authorization: Bearer ${ACCESS_TOKEN}"
     -X GET
     https://www.googleapis.com/sql/v1beta4/projects/[PROJECT_ID]/instances/[INSTANCE_NAME]/backupRuns

echo "Restore backup [BACKUP_ID] in instance [INSTANCE_NAME] in [PROJECT_ID]"
curl --header "Authorization: Bearer ${ACCESS_TOKEN}"
     --header 'Content-Type: application/json'
     --data '{ "restoreBackupContext": {"backupRunId": "[BACKUP_ID]"}}'
     -X POST
     https://www.googleapis.com/sql/v1beta4/projects/[PROJECT-ID]/instances/[INSTANCE_NAME]/restoreBackup