How to record consumer information in prometheus metric with forward-auth plugin

[circlelychen]

Hi guys,

We apply forward-auth plugin on specific Route to realize external authentication model. We could use configure upstream_headers to forward granted UserID or Username to upstream. However, Consumer infomation does not be recored in metrics when enabling prometheus plugin.

Is any possible way to record consumer information in prometheus metric with forward-auth plugin instead of developing custom auth plugin?

Please advise. Thanks