No route matches in rails ?customize privilege of Action of controller in rails

I have two model Follow user and Master . Follow user can show , edit

Master can add,edit,show and delete follow user .

i need use authenticate_user! for admin add,edit,show and delete

& use authenticate_user! for followuser ,edit,show

before_action :authenticate_user!, except: [:new, :create,:show ,:edit, :destroy] when create new Follow user occur this error

No route matches {:action=>"edit", :controller=>"folusers", :id=>nil}, missing required keys: [:id]

This my routes routes.rb

resources :folusers resources :masters