Decoding a JWT in a JavaServer Faces backing bean

UserBean.java

@Named
@SessionScoped
public class UserBean implements Serializable {

    private Map<String, Object> claims;

    @PostConstruct
    public void postConstruct() {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        HttpServletRequest httpServletRequest = (HttpServletRequest) facesContext.getExternalContext().getRequest();
        String jwt = httpServletRequest.getHeader("x-amzn-oidc-data");
        claims = JWT.of(jwt);
    }

    public String getName() {
        return (String) claims.get("name");
    }

}