Signed out of spotify and cant sign back in

Try uninstalling the app, then re-install it, and try starting the app and logging back in. See if that fixes it.

Did it auto sign you out of the xbox one spotify app even though the day before everything worked great, then you try to sign in with the correct email and password but it still says invalid email or password? This happened to me awhile back. I had to
go to the spotify page on my tablet and reset the spotify password. Now the xbox one version works fine.

Also I just had the idea of signing out and signing back in but now I cant even sign in. Please respond soon

And you never were signed in to Spotify either?

Hello Sabrina V, My name is David. I am an independent advisor, happy to help you today.

Third-party problems are almost always due to lack of updating.
Make sure you're using the latest version of the Spotify app on your Xbox. Updates often fix bugs and compatibility issues.

Go to the Microsoft Store on your Xbox.
Search Spotify and check if an update is available. If yes, install it.
Check Playback Settings
Open the Spotify app on your Xbox.
Go to "Your Library" and select the podcast you want to listen to.
Before playing, check that "Play Next" or "Shuffle" is disabled. Sometimes shuffle settings can cause problems.

Also make sure you are using the correct Premium account to sign in to the Spotify app on your Xbox.
If you continue to see ads despite having a Premium account, you may need to sign out and sign back into your Spotify account in the Xbox app.

As advice, Delete Data and Cache
Go to Settings on your Xbox.
Select Storage and then Manage Storage.
Find and select Spotify.
Delete app data and cache.

Best regards.