Adding column in aspNet Identity aspNetUserRoles, and reflect changes with entityframework DB First

I have a question regarding the Identity tables in Asp.NET Identity , especially aspnetUserRoles and Entity framework Database First Approach:
is there a way to add a column in AspNetUserRoles and reflect the changes in EntityFramework generated classes in order to use this newly created column?
if yes , can you please provide me with links or references?
EntityFramework 6.1.3
AspNet.Identity.EntityFramework 2.2.1

Thank you