[web2py] Help!!! This slice doesnt work!!!

[Pystar]

Hello guys, this slice<a href="http://web2pyslices.com/main/slices/
take_slice/77">http://web2pyslices.com/main/slices/take_slice/77</a>
doesnt seem to work as it should. I am using the updated code but it
still doesnt work. I am trying to integrate local auth and Twitter,
Facebook and Google authentication mechanisms into my site but it
complains about having duplicated columns named "marketing" Please
help