def write
      new = get
      new[@note] = @token
      File.open(@file, 'w', 0o0600) { |fh| fh.write new.to_yaml }
    end
def write
      new = get
      new[@note] = @token
      File.open(@file, 'w', 0o0600) { |fh| fh.write new.to_yaml }
    end
Create new Config object, either ephemerally or from a file