Reuse a User instance for a given accesscode

reuse_instance.rb

class User
    def self.new(accesscode)
        @cache ||= {}
        @cache[accesscode] ||= super(accesscode)
    end

    def initialize(accesscode)
        @accesscode = accesscode
    end
end

# Ok. If User.new(:accesscode) is called with same value of accesscode as before, 
# a cached Instance object is returned. Here's the demo -

=> #<User:0x007fb90c22e3a0 @accesscode=:level2>
>> User.new(:level3)
=> #<User:0x007fb90c226dd0 @accesscode=:level3>
>> User.new(:level4)
=> #<User:0x007fb90c21f328 @accesscode=:level4>
>> User.new(:level2)
=> #<User:0x007fb90c22e3a0 @accesscode=:level2>
>> User.new(:level3)
=> #<User:0x007fb90c226dd0 @accesscode=:level3>
>> User.new(:level4)
=> #<User:0x007fb90c21f328 @accesscode=:level4>