Fetch current step

GET https://ingest.spektr.com/v2/public/actions/{token}

  This endpoint is the second step in the onboarding process (and is continually used thereafter using polling mechanism)
  1. After a session is created using the InitOnboarding endpoint and a `token` is generated.
  2. Clients poll this endpoint with the `token` to retrieve the current step.
  3. Depending on the response, the client may need to collect specific data or perform certain actions 
     before calling `Submit` with that data.
  4. The client can then poll again to see if new steps are required or if the process has finished.
  Possible values are **running**, **pending**, **failed** or **completed**. Whenever **pending** is returned, the client should stop polling and submit the required payload according to the step type.