In principle, there is nothing complicated to use Identity without EF.
I, for example, instead EF being developed in the project using Dapper from Stackoverflow
. It's not a big ORM, hence the performance times of 10-12. And if to it to add more plugins (SimpleCRUD etc.), it is possible to get rid of self-written queries.
On the topic, here
is a good article-tutorial to get rid of EF in Identity