Realm mapper Evidence always null

Create custom realm mapper class public class CRM implements RealmMapper { @Override public String getRealmMapping(Principal principal, Evidence evidence) { // evidence is always null in here return null ; } } Register inside standalone <subsystem xmlns= "urn:wildfly:elytron:13.0" final -providers= "combined-providers" disallowed-providers= "OracleUcrypto" > <security-domains> <security-domain name= "Custom-Domain" default -realm= "Custom-Realm" permission-mapper= " default -permission-mapper" realm-mapper= "CustomRealmMapper" role-decoder= "roles-attribute" >                     <realm name= "Custom-Realm" />                 </security-domain> </security-domains> <security-realms> <custom-realm name= "Custom-Realm" module= "local.login" class- name= "local.login.CustomRealm" >                     <configuration>                         <property name= "dataSourceJndiName" value= "java:/CDataSource" />                     </configuration>                 </custom-realm> </security-realms> <mappers> <customer-realm-mapper name= "CustomRealmMapper" module= "local.login" class- name= "local.login.CRM" /> </mappers> </subsystem>