files_external:list "Authentication Type" and "Auth" columns inconsistent

Steps to reproduce

1. as the admin, setup some local storage that provides files on the local server to the ownCloud users
2. files_external:list
3. files_external:list --short

Expected behaviour

Not sure - there is actually no "authentication" for this local storage (the local server just provides it to all users on the system). So "Authentication Type" "None" seems correct.

So what is the column "Auth" that has value "User" ?

Actual behaviour

The --short output has a column "Auth" which displays "User" as the value.
The default output has a column "Authentication Type" which displays "None" as the value.

$ php occ files_external:list --short
+----------+-------------+------------------+-------------------+------+-------+
| Mount ID | Mount Point | Applicable Users | Applicable Groups | Auth | Type  |
+----------+-------------+------------------+-------------------+------+-------+
| 22       | /zzz        | All              |                   | User | Admin |
+----------+-------------+------------------+-------------------+------+-------+
$ php occ files_external:list
+----------+-------------+---------+---------------------+------------------------------+---------+------------------+-------------------+
| Mount ID | Mount Point | Storage | Authentication Type | Configuration                | Options | Applicable Users | Applicable Groups |
+----------+-------------+---------+---------------------+------------------------------+---------+------------------+-------------------+
| 22       | /zzz        | Local   | None                | datadir: "\/home\/phil\/zzz" |         | All              |                   |
+----------+-------------+---------+---------------------+------------------------------+---------+------------------+-------------------+

Server configuration

Current core master github

Start with the files_external:list and files_external:list --short entry points and reproduce the differing values for a local storage. Trace how each output selects its authentication label, then verify that the two commands consistently describe local storage and add or update coverage for both output formats.