Denied users are case sensitive... but not in a good way.

[jneljeff]

If this is a bug report please make sure you have filled the following in:
(If it's not a bug and a feature request then just remove the below)

Plex Requests.Net Version:

1.9.1

Operating System:

Ubuntu Server 16.04

Mono Version:

4.4

Reproduction Steps:

Add user (Plexname123) to denied list. Can log in with slightly different letter case (plexname123).