Xamarin Shell ToolBarItem Image from storage

Hi,

I am a newbie at Xamarin…. So I would appreciate any help…

My app allows a user to select a profile picture - using instructions from:
ttps://lalorosas.com/blog/xamarin-forms-selecting-image-from-the-gallery

My app then saves the image and is able to reload the image into an ImageButton successfully using:
ttps://stackoverflow.com/questions/51038251/how-to-download-image-and-save-it-in-local-storage-using-xamarin-forms

I want to be able to reload the image from the database and put the image into the SHELL 
TOOLBARITEM and I haven’t been able to find instructions on that.

Can someone point me in the right direction.