Curl - Exclamation mark in User Auth/Password
===

Having a problem with CURL and the HTTP User and password Auth methods, it is not liking the exclamation mark, I've tried escaping the following ways:

^^!
\!
'asdfasdf!'


Tried and failed...
/usr/bin/curl -u 'UserName\WithSlash:PasswordWithExclamation!' https://test.com/
/usr/bin/curl -u UserName\\WithSlash:PasswordWithExclamation\! https://test.com/


Not working for basic or digest if it matters... getting 401 denied...