实体类型的Microsoft.AspNet.Identity.EntityFramework。IdentityUserLogin'需要定义一个键

I have a ASP.NET5 MVC application using EF7. It works all fine so far and i'm able to add migrations and persist data in the database. Now after adding Identity to my data layer project I get this error when trying to add a new migration:I have a ASP.NET5 MVC application using EF7. It