def key(self, request, dt):
return '<STR_LIT>' % (<EOL>self.cache_prefix,<EOL>request.META.get('<STR_LIT>', '<STR_LIT>'),<EOL>request.POST['<STR_LIT:username>'],<EOL>dt.strftime('<STR_LIT>'),<EOL>)<EOL>
Derives the cache key from the submitted username too.