public static AuthInitialize create() {
    return new UserPasswordWithExtraPropsAuthInit();
  }
An {@link AuthInitialize} implementation that obtains the user name and password as the
credentials from the given set of properties. If keep-extra-props property exits, it will copy
rest of the properties provided in getCredential props argument will also be copied as new
credentials.

@since GemFire 5.5
geode-dunit/src/main/java/org/apache/geode/security/generator/UserPasswordWithExtraPropsAuthInit.java