    @Test
    public void testListUsersSimple() throws Exception {

        final String[] args = new String[]{"list", credentialsFilePath};
        final CredentialsCLI cli = new CredentialsCLI();
        final CredentialsAction action = cli.processArgs(args);
        Assert.assertEquals(CredentialsCLI.ListUsersAction.class, action.getClass());
        action.execute();
        Assert.assertEquals(action.outputs.length, 6);
        Assert.assertEquals(action.outputs[0], "user1");
    }