To enable the "My account" features on the corresponding shop page, you need to create a login page with user registration. TYPO3 6.2 already provides a login form out of the box and the "femanager" extension from the TER can care about features like user registration, double opt-in, changing passwords by the users and so on.
If your page tree doesn't already contains pages for that, create a
The "My account" page must be accessible only by logged in users. The easiest way is to restrict the page access to a user group added to the sysfolder for the users.
You can add a test user in the same way by choosing "System Records" -> "Website User".
In the page tree, the "My account" page should now be shown as a user restricted page.
Finally, if users want to access the "My account" page but aren't authenticated yet, they should be redirected to the login page.
config.typolinkLinkAccessRestrictedPages = <page ID of your login page>
config.typolinkLinkAccessRestrictedPages_addParams = &return_url=###RETURN_URL###
The first line redirects users to the login page if they aren't already logged in. You have to enter the page ID of your login page which can be found if you hover with your mouse over the page in your page tree. The second line redirects the users to the page they wanted to see originally after they successfully logged in.