I am using rest api to generate a token and download data on my application. Everything works fine with the contents that I have already added to my arcgisonline account. However, my generated tokens does not have access to the layers shared with me in a group. I keep getting 403 error. Is there anyway that I can access those layers in the groups with rest api? Or I have to ask the owner of those layers to grant me access (although I did not see such an option).