Add ability to use oauth2 authentication.

[paldib]

Please add the ability to use the oauth authentication with haproxy ingress controller, either with the haproxy-lua-oauth or external authentication option like nginx ingress controller and oauth-proxy.

[devopstales]

+1

[mateuszdrab]

I've already requested that long time ago #531
Give that one a like so the devs know you're interested
I'd close this one as it's a duplicate

[ivanmatmati]

Hi @paldib , I've added the "enhancement" label so that it can be discussed. Thanks for the suggestion.