def get(profile='default')
      raise 'Config File does not exist' unless File.exists?(@file)

      @credentials = parse if @credentials.nil?
      raise 'The profile is not specified in the config file' unless @credentials.has_key?(profile)

      @credentials[profile]
    end
def get(profile='default')
      raise 'Config File does not exist' unless File.exists?(@file)

      @credentials = parse if @credentials.nil?
      raise 'The profile is not specified in the config file' unless @credentials.has_key?(profile)

      @credentials[profile]
    end
returns hash of AWS credential