code: function SharedIniFileCredentials(options) {
      AWS.Credentials.call(this);
  
      options = options || {};
  
      this.filename = options.filename;
      this.profile = options.profile || process.env.AWS_PROFILE || 'default';
      this.get(function() {});
    }
docs: Creates a new SharedIniFileCredentials object.
  
  @param options [map] a set of options
  @option options profile [String] (AWS_PROFILE env var or 'default')
  the name of the profile to load.
  @option options filename [String] ('~/.aws/credentials') the filename
  to use when loading credentials.