Digital Workshop

I've just started with Opus having used Lectora and Trainersoft for some years. Is there an easy way to create a log in screen that asks for input, but wont let the client proceed any further unless all the required text boxes are filled in? I will also need to track this information, along with the results of any tests. I would be most grateful for any suggestions.
Kind Regards,
Tom

Text input boxes, an if-else function to test whether the input has been left blank or not and a bunch of file and storage actions to record the results is how I made something similar.

The simple example I put together to experiment with is attached

Many thanks, I've plenty of information to use from the example you sent.
Kind Regards,
Tom