[keycloak-user] Provider Dependencies

Hey, I'm writing my custum login provider which works great so far, but i stumbled upon a dependency issue: I wan't to use mail in my authenticator, but when the authenticator gets actually loaded I get an class not found exception. Somehow is java.mail.* not available in the classpath of providers which are dropped in the configuration/providers path. How can i use these dependencies? I could include them into my jar, but i guess thats not the "right" way. Thanks