public static boolean checkUserName(String userName) {
        return regexChecks(userName, Constants.REGEX_USER_NAME);
    }
@Test
    public void testCheckUserName() {
        Assertions.assertTrue(CheckUtils.checkUserName("test01"));
        Assertions.assertFalse(CheckUtils.checkUserName(null));
        Assertions.assertFalse(CheckUtils.checkUserName("test01@abc"));
    }