How do I save a Geotiff from Julia? From Omniscape tutorial

I'm a total newbie to Julia and started by working my way through this tutorial https://docs.circuitscape.org/Omniscape.jl/latest/examples/ on wildlife habitat connectivity. How can I save the resulting GeoTiff files to my local computer. e.g., to save normalized_cum_currmap.tif. I've been playing around with 'write' and 'export' commands, but no success. Thank you very much.