Support OAuthBearer Authentication

[psycotica0-shopify]

With KIP-255 OAuth Authentication via SASL/OAUTHBEARER, Kafka now supports OAuth tokens as a method of authentication.

For us to use it on the brokers requires the library to support it, so I'm creating this issue here in case someone beats us to it (or it's already done somewhere I haven't found)

[jeffwidman]

A PR would be very welcome!

[shawnsarwar]

Is anyone actively working on this? I'd hate to duplicate effort.

If not, there's some helpful prior art in this article, which describes a java implementation. The repo for the example is available here and would be a useful reference to work against if you don't already have a broker running OAUTHBEARER.

[psycotica0-shopify]

We aren't yet, but we will be shortly, probably, if no one beats us to it (which would be great, TBH)
There's also zendesk/ruby-kafka#710 and IBM/sarama#1240 if you're looking for other references.

[pt2pham]

@shawnsarwar just wondering if you're currently doing work on this or if it would be okay for me to do it!

[pt2pham]

I am now working on this!

[pt2pham]

This issue can be closed now

[dpkp]

Woot!