But using External Login, there will be a 2 set of data for 1 user, in this case If I want to delete user from the External Application, It wont be deleted from the WordPress default database, and in that situation we cant remove, add, update new user. I am looking for something by which I can achieve a way where user can be authenticated from out side database(by an external Application) and there will be no use of WP user table while it comes to user interaction.
