Vaadin + Spring Security

I have a problem for user access, I use spring security spring security and form login of vaadin. @Secured annotation does not work. Then my LoginMainView is accessible by all users and I want it to be accessible just by Admin. I am new in spring security and vaadin. I put my project in the github to see what I did if is good or not? And where is the problem?

my path login is : http://localhost:8080/vaadinsecurity/

Link : https://github.com/Aladdinko/VaadinSpringSecurityy

thank you, is you need more information don't hesitate to contact me

One good place to start with Spring security and Vaadin is: https://vaadin.com/blog/-/blogs/filter-based-spring-security-in-vaadin-applications. 
I'm unfamiliar with the xml-based configuration of Spring security, but if there is form login doesn't Spring security in this case then expect that the login data to be POST:ed to a certain url? This doesn't seem to happen here. 

-Pontus