@Override
    public Future<U> link(U current, BasicProfile to) {
        return toScala(doLink(current, to));
    }
@ Override public Future < U > link ( U current , BasicProfile to ) { return toScala ( doLink ( current , to ) ) ; }
Links the current user Identity to another

@param current The Identity of the current user
@param to The Identity that needs to be linked to the current user