curl --request POST \
  --url https://staging.api.commercengine.io/api/v1/{store_id}/storefront/pos/auth/pair-device \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '{
  "device_id": "<string>",
  "pin": 123,
  "external_device_id": "<string>"
}'

{
  "message": "<string>",
  "success": "<string>",
  "content": {
    "device_token": "<string>"
  }
}