@JsonProperty
    public boolean isAddOpenIdAccessToken() {
        return addOpenIdAccessToken;
    }
If true, add Open ID authentication headers to the request. Only works if the identityProviderType
is EXTERNAL_IDP and the destination is in the same Open ID Connect realm as the OIDC client that this
proxy instance is using.
stroom-proxy/stroom-proxy-app/src/main/java/stroom/proxy/app/handler/ForwardHttpPostConfig.java