Why Does Tweetdeck ask for My Password Everytime I log in!

Why does Tweetdeck keep asking me for my password when I open it?  It is set for 2 factor authentication but the SMS takes minutes to get to me.  Sometimes like today it doesn’t seem to ever get to me.  First, they should let me use a code generator like others do.  Second, I should still be able to declare my computer or my browser as a trusted device thereby me reducing the amount of times I have to use 2-factor.  This is quite annoying.