gateway-provider-security-pac4j/src/main/java/org/apache/knox/gateway/pac4j/filter/Pac4jIdentityAdapter.java
gateway-provider-security-preauth/src/main/java/org/apache/knox/gateway/preauth/filter/AbstractPreAuthFederationFilter.java

gateway-provider-security-pac4j/src/main/java/org/apache/knox/gateway/pac4j/deploy/Pac4jFederationProviderContributor.java
gateway-provider-security-preauth/src/main/java/org/apache/knox/gateway/preauth/deploy/HeaderPreAuthContributor.java