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 "Options"  menu at the top right of the screen.
• 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.