Make email unique (as it makes no sense any other way on GAE), default username to None, not empty string (which wouldn't validate)
Make email unique (as it makes no sense any other way on GAE), default username to None, not empty string (which wouldn't validate)

potatolondon/djangae,martinogden/djangae,chargrizzle/djangae,armirusco/djangae,asendecka/djangae,nealedj/djangae,grzes/djangae,pablorecio/djangae,martinogden/djangae,trik/djangae,wangjun/djangae,grzes/djangae,jscissr/djangae,stucox/djangae,pablorecio/djangae,trik/djangae,asendecka/djangae,stucox/djangae,armirusco/djangae,SiPiggles/djangae,nealedj/djangae,wangjun/djangae,trik/djangae,pablorecio/djangae,jscissr/djangae,leekchan/djangae,kirberich/djangae,martinogden/djangae,kirberich/djangae,chargrizzle/djangae,asendecka/djangae,leekchan/djangae,SiPiggles/djangae,kirberich/djangae,potatolondon/djangae,armirusco/djangae,grzes/djangae,nealedj/djangae,chargrizzle/djangae,SiPiggles/djangae,wangjun/djangae,jscissr/djangae,stucox/djangae,leekchan/djangae