curl --request POST \
  --url https://integrations.clopos.com/open-api/auth \
  --header 'Content-Type: application/json' \
  --data '{
  "client_id": "your_client_id",
  "client_secret": "your_client_secret",
  "brand": "your_brand",
  "venue_id": "your_venue_id"
}'

{
  "token": "at_live_1234567890abcdef1234567890abcdef",
  "expires_in": 3600
}