Details of the call:

ubuntu@os-1:~$ cinder attachment-show 7efd5656-dc84-4996-ae7f-323142986a85
+-------------+--------------------------------------+
| Property    | Value                                |
+-------------+--------------------------------------+
| attach_mode | rw                                   |
| attached_at | 2017-11-28T22:38:55.000000           |
| detached_at |                                      |
| id          | 7efd5656-dc84-4996-ae7f-323142986a85 |
| instance    | 2d509dbc-8b62-49a9-b5fe-ad5d9c169bdd |
| status      | attached                             |
| volume_id   | b822fb57-b820-47ae-b97f-0c85ea7bcfa5 |
+-------------+--------------------------------------+
+--------------------+-----------------------------------------------------------------------+
| Property           | Value                                                                 |
+--------------------+-----------------------------------------------------------------------+
| access_mode        | rw                                                                    |
| attachment_id      | 7efd5656-dc84-4996-ae7f-323142986a85                                  |
| auth_method        | CHAP                                                                  |
| auth_password      | Aa8WDrNaZAYBN8sa                                                      |
| auth_username      | C4W5WBxj3WgxvCaKMEvR                                                  |
| driver_volume_type | iscsi                                                                 |
| encrypted          | False                                                                 |
| qos_specs          | None                                                                  |
| target_discovered  | False                                                                 |
| target_iqn         | iqn.2010-10.org.openstack:volume-b822fb57-b820-47ae-b97f-0c85ea7bcfa5 |
| target_lun         | 1                                                                     |
| target_portal      | 10.117.36.28:3260                                                     |
| volume_id          | b822fb57-b820-47ae-b97f-0c85ea7bcfa5                                  |
+--------------------+-----------------------------------------------------------------------+

### Raw response below from the view-builder, note the connection_info key should be popped for non-admin callers

{'attachment': {'status': u'attached', 'detached_at': '', 'connection_info': {u'auth_password': u'Aa8WDrNaZAYBN8sa', u'attachment_id': u'7efd5656-dc84-4996-ae7f-323142986a85', u'target_discovered': False, u'encrypted': False, u'driver_volume_type': u'iscsi', u'qos_specs': None, u'target_iqn': u'iqn.2010-10.org.openstack:volume-b822fb57-b820-47ae-b97f-0c85ea7bcfa5', u'target_portal': u'10.117.36.28:3260', u'volume_id': u'b822fb57-b820-47ae-b97f-0c85ea7bcfa5', u'target_lun': 1, u'access_mode': u'rw', u'auth_username': u'C4W5WBxj3WgxvCaKMEvR', u'auth_method': u'CHAP'}, 'attached_at': datetime.datetime(2017, 11, 28, 22, 38, 55), 'attach_mode': u'rw', 'instance': '2d509dbc-8b62-49a9-b5fe-ad5d9c169bdd', 'volume_id': 'b822fb57-b820-47ae-b97f-0c85ea7bcfa5', 'id': '7efd5656-dc84-4996-ae7f-323142986a85'}}