Has anyone integrated with DNN

I am trying to integrate with an older version of DNN (v7). I have the keys and the WebSDK is set up to work with the URL of the web site that uses DNN. I am having a slightly difficult time getting the integration to work properly though.

I am getting the DUO push, but I am uncertain how to get that push to return appropriately so the login completes.

Anyone out there have advice on what I might be missing? I think it has something to do with the return to a URL or to a callback function or something.

Any suggestions on what to try would be much appreciated.