curl --request POST \
  --url https://api.agentixx.io/api/contacts \
  --header 'Content-Type: application/json' \
  --header 'x-tenant-id: <api-key>' \
  --cookie better-auth.session_token= \
  --data '
{
  "waId": "972501234567",
  "displayName": "John Doe",
  "language": "en"
}
'

{}