Gst registration

I have taken voluntary TIN no. (MVAT) on 28/06/2017. I got my TIN no. but didnt get RC copy for it. Through mail they have given just a TIN no & password. This client doesnt covered under Phase 6. It falls under probably next phase. Now how I can get GSTIN for it. Since no provisional ID I can create for it i.e. there is no such link..