amazon s3 - Share variables across different classes Ruby -

i want have 1 main class , inside variables want call inside other classes. example:

class awss3initalization   attr_reader :resource, :client    def initialize resource, client     @resource = resource     @client = client     # define variables below? think not right place put them     @resource = aws::s3::resource.new(region: 'region', access_key_id: 'my-key', secret_access_key: 'secret-key')     @client = aws::s3::client.new(region: 'region', access_key_id: 'my-key', secret_access_key: 'secret-key')   end end 

i want able call @resource , @client in other classes have. best way this?

best way inherit other classes awss3initalization like:

class foo < awss3initalization end  class bar < awss3initalization end 

then able access variables parent class subclasses.

update

class awss3initialization   access_key = <read-from-yml>   secret_key = <read-from-yml>    def self.resource     aws::s3::resource.new(...)   end    def self.client     aws::s3::client.new(...)   end end