Sign out of the Kobo Books app if you want to change accounts or troubleshooting to fix a problem.
Before you start:
- Have your Kobo account username and password ready.
- Tap the Kobo icon at the top of the screen. 
- Go to the Home screen.
- 
Tap the Profile icon near the top-right of the screen. 
- 
Scroll to the very bottom of the screen and tap Sign out of Kobo. 
 You'll see a 'Warning' dialog box.
- Tap Continue to sign out.
After you’ve signed out of the Kobo Books app, tap Sign In and follow the onscreen steps to sign back in.