You can switch to another account by first logging out from your current account. To do that, please follow the instructions below:
- Open the game and go to the home screen.
- Click on the cogwheel button in the upper right to bring up the "Options" menu.
- Select the "Account Settings" tab
- Click on the "Logout" button and click on "Confirm"
- After this, you will be able to log in with a different account upon restarting the game.