code: func (r Network_Storage) GetByUsername(username *string, typ *string) (resp []datatypes.Network_Storage, err error) {
  	params := []interface{}{
  		username,
  		typ,
  	}
  	err = r.Session.DoRequest("SoftLayer_Network_Storage", "getByUsername", params, &r.Options, &resp)
  	return
  }
docs: // Retrieve network storage accounts by username and storage account type. Use this method if you wish to retrieve a storage record by username rather than by id. The ''type'' parameter must correspond to one of the available ''nasType'' values in the SoftLayer_Network_Storage data type.