ok.py

class AccountsStatisticsDetail(TemplateView):
    template_name = 'grow/accountsstatistics.html'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        username = self.kwargs.get('username')
        if username:
            context['username'] = username
            context['account_stats'] = (
                AccountsStatistics.objects
                .filter(username__username=username)
            )
        return context