code: def list(self, request, *args, **kwargs):
          
          return super(CustomerPermissionViewSet, self).list(request, *args, **kwargs)
docs: Each customer is associated with a group of users that represent customer owners. The link is maintained
          through **api/customer-permissions/** endpoint.
  
          To list all visible links, run a **GET** query against a list.
          Response will contain a list of customer owners and their brief data.
  
          To add a new user to the customer, **POST** a new relationship to **customer-permissions** endpoint:
  
          .. code-block:: http
  
              POST /api/customer-permissions/ HTTP/1.1
              Accept: application/json
              Authorization: Token 95a688962bf68678fd4c8cec4d138ddd9493c93b
              Host: example.com
  
              {
                  "customer": "http://example.com/api/customers/6c9b01c251c24174a6691a1f894fae31/",
                  "role": "owner",
                  "user": "http://example.com/api/users/82cec6c8e0484e0ab1429412fe4194b7/"
              }