class Aws::SharedConfig

def self.config_reader(*attrs)

values are loaded from
Uses the get_config_value below to control where
Add an accessor method (similar to attr_reader) to return a configuration value 
def self.config_reader(*attrs)
  attrs.each do |attr|
    define_method(attr) { |opts = {}| get_config_value(attr.to_s, opts) }
  end
end