ASP.NET/Identity Error: The entity type ApplicationUser is not part of the model for the current context

In Move ASP.NET Identity store to EF Sql database zoidbergi described an issue similar to that which I’m experiencing, but which was not completely answered. I am receiving the error above when attempting to migrate from the inbuilt .mdf database to MySQL. I am using a Database-First methodology and have successfully created the Entity Model from the underlying Mysql database.