Simplified this a bit into a helper. It's kinda odd to me, but
convenient for this moment, that Rails allows views to read `params`! I
guess it's for escape hatches exactly like this! lol
including validation logic to make sure it's not already connected to
another one!
The `intent` param on the NeoPass form is part of the key! Thanks
OmniAuth for making it easy to pass that data through!
I'm getting ready to add handling for "what if you don't *have* a
current password*??", so it seems like the right way to do that is to
just eject the controller and start customizing!
