Web config to use AWS SDK store

How do I edit the web.config to use the SDK store rather than a credentials file?

Currently, I have,

    <section name="aws" type="Amazon.AWSSection, AWSSDK"/>
</configSections>
  <aws profileName="chris" profilesLocation="C:\Users\Chris\Documents\Work\AWS\credentials"/>

but the credentials file is in plain text, so it isn't secure.

The website here describes using the SDK store...but I can't find where it specifies what I need to change in the web.config file to use the store. Also, I am pretty sure that my user is in the store...but the website claims there is some graphical user interface for adding the users in visual studio, and I'm not sure where that is..