security/ir.model.access.csv

   1 id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
   2 point_of_sale.access_pos_session_user,pos.session user,point_of_sale.model_pos_session,point_of_sale.group_pos_user,1,0,0,0