def auth_keys
      AUTH_KEYS.inject({}) do |keys_hash, key|
        keys_hash[key] = send(key)
        keys_hash
      end
    end
def auth_keys
      AUTH_KEYS.inject({}) do |keys_hash, key|
        keys_hash[key] = send(key)
        keys_hash
      end
    end
Creates the configuration
 @param [Hash] hash containing configuration parameters and their values
 @return [Configuration] a new configuration with the values from the
   config_hash set
 Returns a hash of api keys and their values