code: function MailjetClient (api_key, api_secret, options, perform_api_call) {  
    return this.authStrategy(api_key, api_secret, options, perform_api_call)
  }
docs: /*
  MailjetClient constructor.
  
  @qpi_key (optional) {String} mailjet account api key
  @api_secret (optional) {String} mailjet account api secret
  @options (optional) {Object} additional connection options
  
  If you don't know what this is about, sign up to Mailjet at:
  https://www.mailjet.com/