curl --request GET \
  --url https://api.hubapi.com/conversations/v3/custom-channels/{channelId}/channel-accounts/{channelAccountId} \
  --header 'Authorization: Bearer <token>'

{
  "active": true,
  "archived": true,
  "authorized": true,
  "channelId": "<string>",
  "createdAt": "2023-11-07T05:31:56Z",
  "id": "<string>",
  "inboxId": "<string>",
  "name": "<string>",
  "archivedAt": "2023-11-07T05:31:56Z",
  "deliveryIdentifier": {
    "type": "CHANNEL_SPECIFIC_OPAQUE_ID",
    "value": "<string>"
  }
}