message: Make signupUrl not fail
diff: @@ -5,5 +5,5 @@ import pathJoin from 'ember-osf/utils/path-join';
  import OSFAgnosticAuthControllerMixin from 'ember-osf/mixins/osf-agnostic-auth-controller';
  export default Controller.extend(OSFAgnosticAuthControllerMixin, {
  - signupUrl: pathJoin(config.OSF.url, 'register?', $.param({ next: window.location.href })),
  + signupUrl: `${pathJoin(config.OSF.url, 'register')}?${$.param({ next: window.location.href })}`,
  });
  