Can a user authenticate by logging in instead of entering API key?

Looking at making HA work with our UI on the Mark II. Typing in a 183ish character API key manually doesn’t seem reasonable, and other things will take longer to build. Is it possible authenticate to the HA server by logging in to an account instead of using an API key?

Extra info:
(In case it is needed to help figure out the answer, our UI is Neon AI, it’s made to run on the Mycroft Mark II as well as Linux and Pi4. I don’t have HA yet myself to test this out, my home still has a very low IQ. :wink: I’m excited about the possibilities, but this information is needed faster than I can figure it out. Hoping someone in the community can offer a quick answer.)
Thank you!