Logging out of your account can be done directly from the home feed. The steps are slightly different on desktop and mobile.
Here's how to log out of your account:
On desktop
From your home feed, click on your profile in the bottom-left corner.
From your account menu, select Logout.
You'll be logged out of your account.
On mobile (iPhone or iPad)
On mobile, the sidebar is collapsed by default, so the profile icon isn't immediately visible. Here's how to log out:
From your home feed, tap the menu icon in the top-left corner to expand the sidebar.
Look for your profile icon at the bottom-left of the expanded sidebar.
Tap your profile icon, then select Logout.
You'll be logged out of your account.