code: def send_confirmation_email(self):
          
          form = self._get_form('SECURITY_SEND_CONFIRMATION_FORM')
          if form.validate_on_submit():
              self.security_service.send_email_confirmation_instructions(form.user)
              self.flash(_('flask_unchained.bundles.security:flash.confirmation_request',
                           email=form.user.email), category='info')
              if request.is_json:
                  return '', HTTPStatus.NO_CONTENT
  
          elif form.errors and request.is_json:
              return self.errors(form.errors)
  
          return self.render('send_confirmation_email',
                             send_confirmation_form=form,
                             **self.security.run_ctx_processor('send_confirmation_email'))
docs: View function which sends confirmation token and instructions to a user.