Django How do i determine what arguments are missing?

Trying to access part of code by get request and receiving this error NoReverseMatch: Reverse for 'homepage' with arguments '()' and keyword arguments '{}' not found. 0 pattern(s) tried: [] looked around for help and i think its that am missing some arguments. here is request am using in my test

req = self.client.get('/password/reset/')

and the code it leads to is as:

class PasswordResetEmailView(FormView):
   template_name = 'temp/password_reset.html'
   form_class = PasswordResetForm
   success_url = 'password_reset_ok'

   def get(self, request, *args, **kwargs):
      form = self.get_form(self.form_class)
      return self.render_to_response(self.get_context_data(form=form))

any guidance ?