Retrieves subscription details about the Notification service for the specified subscriber.
The following is sample output for the subscriber with the ID of '1'.
efa notification subscribers get 1
+-----------+-----------------------------------------------------------------------+
| attribute | value                                                                 |
+-----------+-----------------------------------------------------------------------+
| id        | 1                                                                     |
+-----------+-----------------------------------------------------------------------+
| handler   | http                                                                  |
+-----------+-----------------------------------------------------------------------+
| endpoint  | https://path/to/my/service:port                                     |
+-----------+-----------------------------------------------------------------------+
| config    | {"cacert":"","insecure":true,"password":"mypassword",
              "username":"myusername"}                                              |
+-----------+-----------------------------------------------------------------------+
Notification Subscriber ID=1
--- Time Elapsed: 2.203878641s ---