List contacts for a channel

curl --request GET \
  --url https://api.wazapin.com/v1/channels/{channelID}/contacts \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "is_business": true,
      "name": "<string>",
      "phone": "<string>",
      "push_name": "<string>",
      "user_id": "<string>",
      "verified_name": "<string>"
    }
  ]
}