How to record screen+audio+microphone with RecordRTC

I am working on a project where I need the user to be able to record screen, audio and microphone. At the moment I could only make it recognize screen and audio

invokeGetDisplayMedia(success, error) {
        let displaymediastreamconstraints = {
          video: {
            displaySurface: 'monitor', // monitor, window, application, browser
            logicalSurface: true,
            cursor: 'always' // never, always, motion
          }
        };
        // above constraints are NOT supported YET
        // that's why overridnig them
        displaymediastreamconstraints = {
          video: true,
          audio:true
        };
        if (navigator.mediaDevices.getDisplayMedia) {
          navigator.mediaDevices.getDisplayMedia(displaymediastreamconstraints).then(success).catch(error);
        }
        else {
          navigator.getDisplayMedia(displaymediastreamconstraints).then(success).catch(error);
        }
      },
      captureScreen(callback) {
        this.invokeGetDisplayMedia((screen) => {
          this.addStreamStopListener(screen, () => {
            //
          });
          callback(screen);
        }, function (error) {
          console.error(error);
          alert('Unable to capture your screen. Please check console logs.\n' + error);
        });
      },
      

from How to record screen+audio+microphone with RecordRTC