Criar um canal

curl --request POST \
  --url https://api.wappfy.io/api/instances/{instanceId}/channels \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "My Channel",
  "description": "Channel description"
}
'

{
  "id": "120363XXX@newsletter",
  "name": "Company Updates",
  "description": "<string>"
}