It's a strange issue. I've not reinstalled my iOS, but noticed last week I was logged out of the Starbucks app. When I tried to login, I got the username/password invalid message. Double checked that everything was in order, but just wouldn't accept the credentials. Uninstalled and reinstalled the app., didn't resolve. I get an error on the app. if I try to reset my password, which is really weird. And as I recall, the issue started happening in the middle of a beta. In other words, the app didn't stop working when beta 7 was installed, rather days later. All good on the website, just a pain to order every day via Safari.Did all that, site works fine. I had to reinstall iOS and was logged out of everything, seems like that's the issue.