code: public void setPersonData(final String id, final String username, final String email) {
      this.rollbar.configure(new ConfigProvider() {
        @Override
        public Config provide(ConfigBuilder builder) {
          return builder
              .person(new PersonProvider(id, username, email))
              .build();
        }
      });
    }
docs: Set the person data to include with future items.
  
  @param id an identifier for this user.
  @param username the username of the user.
  @param email the email of this user.