To log out you must first add a recovery method to your account.
You can do this by going to Extras Menu and adding an ATA ID/Facebook Link/Apple ID Link.
How do I log out?
STEP 1 - Go to Extras and tap DISCONNECT DEVICE.
STEP 2 - Tap Confirm on the pop-up.
Please note we strongly encourage you to shield your account if you will be disconnecting it from your device to ensure no troops are lost while you are logged out!
STEP 3 - Your are logged out!