create cloud mask for this application

[PamelaOchungo]

Hallo there. Fantastic script you have written here! I have followed the steps you have indicated here and i get a classified image with very low validation accuracy (30%), which I suspect is due to presence of heavy cloud cover. I do need to create a cloud mask because my images are very cloudy. The usual landsat cloud algorithms are not working for some reason and they are asking for landsat images with 'Sensor_id'.

Thanks

Pamela