Allow custom `.includes( ... )` for `current_user`

[glacials]

Thanks for all your hard work on Authie, I've been using it for 9 years in my project and it has served me well!

I recently enabled strict_loading mode in Rails and it has identified some application code where I fetch associations through current_user, resulting in extra queries.

Since I don't control current_user and I'm not keen to monkey patch it, I've had to disable strict loading mode for User. It would be great to be able to effectively call current_user.includes(:associations)... or similar, so I could reduce the number of queries hitting the database and enable strict loading mode again for User.

Thanks for reading!