The Account Settings page will show you a summary of your user and store account information. This page will also allow you to perform simple account functions such as:
Setting up/Updating your 2-Step Authentication
View/Add/Update your store's Administrator Access options
View/Update your Billing and Plan information
And more.
To access the page:
Log into your Online Store Manager.
At the top right of the screen, click on your username.
Select Account Settings from the menu.