curl --location --request POST 'https://services.sunnyday.co.id/api/calendars/groups/validate-slug' \
--header 'Version: 2021-04-15' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
"locationId": "ve9EPM428h8vShlRW1KT",
"slug": "calendar-1"
}'{
"available": true
}