code: @SneakyThrows
      protected boolean updateUserResource(final UserResource user, final Principal p, final Credential credential) {
          this.mapper.map(user, p, credential);
          return endpoint.update(user) != null;
      }
docs: Update user resource boolean.
  
  @param user       the user
  @param p          the p
  @param credential the credential
  @return the boolean