code: def gen403(request, baseURI, reason, project=None):
      
      orgas = None
      public_ask = False
  
      if not settings.PIAPI_STANDALONE:
          from organizations.models import Organization
  
          if project and project.plugItLimitOrgaJoinable:
              orgas = project.plugItOrgaJoinable.order_by('name').all()
          else:
              orgas = Organization.objects.order_by('name').all()
  
          rorgas = []
  
          # Find and exclude the visitor orga
          for o in orgas:
              if str(o.pk) == settings.VISITOR_ORGA_PK:
                  public_ask = True
              else:
                  rorgas.append(o)
  
          orgas = rorgas
  
      return HttpResponseForbidden(render_to_response('plugIt/403.html', {'context':
          {
              'reason': reason,
              'orgas': orgas,
              'public_ask': public_ask,
              'ebuio_baseUrl': baseURI,
              'ebuio_userMode': request.session.get('plugit-standalone-usermode', 'ano'),
          },
          'project': project
      }, context_instance=RequestContext(request)))
docs: Return a 403 error