Feature Request: add username header

[gfrankliu]

n proxy mode we can specify a header that will be filled with the validated email address from the JWT token. The value will only contain the email address, eg: [email protected]:

gcp-iap-auth --audiences=YOUR_AUDIENCE --backend=http://localhost:8080 --email-header=X-WEBAUTH-USER

Can we have another header just to provide username? eg: name from [email protected] using --name-header=X-WEBAUTH-NAME

[gfrankliu]

Something like this but with a different header name.

[gfrankliu]

A better feature request would be to have the injected headers customizable using JMESPath like Grafana did in its jwt auth. This will make injected response headers (when running gcp-iap-auth in server mode for nginx auth_request) and request headers (when running in reverse proxy mode) use anything from the jwt token as value.