You can sign out from the mobile apps by following these steps.
Click on the 3 dotted “More” Icon located on the bottom right corner.
From here, click on “My account” on the bottom of the page.
A confirmation page will slide, click on Sign out.
Click on the Menu Icon located on the upper left side.
The screen will slide to make additional options available.
From there you can choose to Power icon (sign-out) located on the upper left corner of the page.
A confirmation page will pop up, click on Sign out.