[keycloak-user] ${url.resourcesPath} not working in email-verification.ftl template

Hello, I am using single sign on service from redhat v7.1 and I am developing a custom template (in a custom theme) for verification email. In the email, I am using ${url.resourcesPath} for <img src="${url.resourcesPath}/img/image.jpg"> and is not working. The template is not used when I use it. Could you help me? Thank you in advanced. Sincerely, Antonia Nicolaou