Configuring HTTP Proxy with Active Directory Credentials

Problem: Unable to create HTTP proxy with special characters in the username such as DOMAIN\Username or username@domain

Expected outcome: Expected to be able to create a HTTP Proxy with an AD Username.

Foreman and Proxy versions: Foreman 2.3.2

Foreman and Proxy plugin versions: Katello 3.18.1

Distribution and version: Centos 7.9

Other relevant data:

The error I get on the Web UI is as follows:

bad component(expected userinfo component or user component): hq_it_nt\OBFRESCATED

Any assistance would be great!