Edu Clean login re-direct

Hi,

We have the edu-clean installed and would like the login button re-direct to be changed.
It currently re-directs to the home page on the multi-site but what we want it to do is re-direct to each user's own site front page which is named according to their username.

So to explain, the main site's home page is:
http://www.gardenadvice.co.uk/my-garden-team/

My username is "dylancothill" and my site is:
http://www.gardenadvice.co.uk/my-garden-team/dylancothill/

So simply I would like the login re-direct to point to the main url + the username

Can anyone help and tell me what needs to go in this snippet of code (and/or what needs to be added) in profile.php to get it to work:
<p><input name="submit" type="submit" value="Login" class="submit-button"/>
<input type="hidden" name="redirect_to" value=""/>
</p>

Thanks
Dylan