the app is obviously a ROKU app as it is standard throughout their system. the real issue is that after hours of MY wasted time, roku was asking for my username on the ROKU APP which was up and running instead of what looked like the obvious request for a pw from Sirius.
for clarity, had roku included the words "add your ROKU user name and password" to the form, problem would have been solved.
I'm a new, gonna be former user of a company that hides from their customer, with zero customer contact, that expects their customers to band together to solve ROKU's shortcomings.
by the way, even the roku customer contact form does not send or work.