ruby - Understanding CanCan initialize method -

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i'm having hard time understanding how cancan works. have following model 

class ability   include cancan::ability   def initialize(user)     if user && user.email == "jason@gmail.com"       can :access, :rails_admin       # allow admin users access rails admin       can :dashboard                  # allow access dashboard     end   end end

when comes rails_admin file in initializers folder

railsadmin.config |config|   config.authorize_with :cancan    config.main_app_name = ['pr', 'admin']    config.current_user_method { } # auto-generated end

i want have 1 user access admins dashboard email "jason@gmail.com", how cancan know signed in @ time? rely on helper method i'm missing?

cancan uses current_ability method supply ability, and in uses current_user. know @ least devise has method, other auth frameworks must commonly supply too, not sure.


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