so the problem got solved. you have to turn flight mode on then open the App spotify go to settings go offline mode then log out then make the flight mode out again. create new password on the Internet website and then sign up for Spotify when registering, ask the Google smart lock and then none of this
then close the App once and then it goes again
Check your registered email's inbox, Spotify might have sent a mail telling you that they have reset your password due to suspicious activity. Reset it, go offline and log out of your account in the app > go back online and log in.
4. Re open Spotify app, this time you will be able to enter your password
This is absolutely the solution.
I did as itai7se suggested and the problem immediately stopped for me. All of the other things people are suggesting are "back doors" to get your Spotify password to match what Google had saved. The method of itai7se was certainly quick and easy, and good to know for other times when this might happen with another app.
For those that needlessly bought an Iphone, please forgive me. This problem only happeded to me this afternoon.