@HighFrequencyInvocation
    public Optional<ShardingSphereUser> findUser(final Grantee grantee) {
        return configuration.getUsers().stream().filter(each -> each.getGrantee().accept(grantee)).findFirst();
    }
@Test
    void assertNotFindUser() {
        assertFalse(createAuthorityRule().findUser(new Grantee("admin", "127.0.0.1")).isPresent());
    }