How I can convert this Java class to Kotlin?
import java.util.Collection;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.GrantedAuthority;
public final class DomainUsernamePasswordAuthenticationToken extends UsernamePasswordAuthenticationToken {
private final String domain;
public DomainUsernamePasswordAuthenticationToken(String principal, String credentials, String domain) {
super(principal, credentials);
this.domain = domain;
}
public DomainUsernamePasswordAuthenticationToken(CalendarUser principal, String credentials, String domain,
Collection<? extends GrantedAuthority> authorities) {
super(principal, credentials, authorities);
this.domain = domain;
}
public String getDomain() {
return domain;
}
private static final long serialVersionUID = -5138870746127783L;
}