curl --request POST \
  --url https://{tenantDomain}/api/v2/flows/vault/connections \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "app_id": "ACTIVECAMPAIGN",
  "setup": {
    "type": "API_KEY",
    "api_key": "<string>",
    "base_url": "<string>"
  }
}
'

{
  "id": "<string>",
  "app_id": "<string>",
  "name": "<string>",
  "ready": true,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "fingerprint": "<string>",
  "environment": "<string>",
  "account_name": "<string>",
  "refreshed_at": "2023-11-07T05:31:56Z"
}