curl --request POST \
  --url https://api.comm.com/api/management/voice/provider-accounts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "provider": "vapi",
  "username": "<string>",
  "api_key": "<string>",
  "concurrency_limit": 2,
  "is_personal": true
}
'

{
  "data": {
    "id": "<string>",
    "username": "<string>",
    "name": "<string>",
    "meta": [
      "<unknown>"
    ],
    "is_active": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "deleted_at": "2023-11-07T05:31:56Z",
    "concurrency_limit": 123,
    "is_personal": "<string>",
    "numbers_count": 123
  }
}