I don't know anyone's proficiency level, so I'm gonna keep this as simplified as possible - sorry if you're more advanced!
If you log in on a desk top or tablet, you click on the gear symbol next to your log out button at top right of screen. it will come up with profile.
Along the top, there is a little arrow coming down from the blue. There are headers like account, security, payments etc above this in white. Click on 'security' at the top and the page will change, with the blue downward arrow moving across to be under 'security'. You will see a section called Auto-login, and a button to manage that section. Go in there and you will find one-touch, just move the slider to turn on or off.
