docs: @Override
      public Principal getUserPrincipal() {
          if (System.getSecurityManager() == null) {
              return collabUtils.getCallerPrincipal(false, null, true, isJaspiEnabled);
          } else {
              return AccessController.doPrivileged(new PrivilegedAction<Principal>() {
  
                  @Override
                  public Principal run() {
                      return collabUtils.getCallerPrincipal(false, null, true, isJaspiEnabled);
                  }
              });
          }
      }