Joget is using the gravatar.com service to display the image (which you can hide if not needed in Userview Builder - Settings). Go to gravatar.com and create your email account and Joget will retrieve the profile image based on your Joget user setup email address.

In fact, you can make a form that has the user's name as ID (you have to save it in a personalized way for it to be done like this) and in it request the photo. Then, with a hash variable (with, for example #form.userprofiletable.image[{currentUser.id}]#) you can compose the URL of the photo in the userview, selecting "Using hash variable" in the user image configuration.

Thanks Matthew King  . But I tried another method.

Going to Admin Panel → Properties & Export →  Add Resource and upload the Image.

Once Uploaded, Click on Image you will get the Hash Variable link, Copy that.

Paste in the Userview where you want to change the gravatar image.