ruby on rails - ActiveAdmin Gem: Redirect user to login page if not logged in -


i working active admin gem , working great. minor i'm facing whenever manually enter url such as:

https://www.example.com/admin/users/5

and if admin not logged in above url page shows: 

{"errors":["you need sign in or sign before continuing."]}

which fine, want redirection login page , if admin log in page, should show desired page pointing https://www.example.com/admin/users/5

i'm not able figure out redirection procedure activeadmin.

in config/initializers/active_admin.rb have such config

config.authentication_method = :authenticate_admin_user!

then create method named authenticate_admin_user! in applicationcontroller

def authenticate_admin_user!   #check current_user if not redirect login end

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