Try this. If you have your browser autofill settings turned on, you will never have to type out your user name and password after you've already done it once. I use Firefox on desktop, and Chrome on Android and Samsung galaxy phones, and I never have to type in my user name and password to log-in here.
Just click in the log-in box and your user log-in name will come up for you to select and then your password will automatically filly in.
Below is how to adjust the settings for different browsers. Give it a try.