How can i use instagram api without the need for user to login? Say my apps is a signage and user only need to put their instagram url and the images will be shown in a slideshow component. Is this possible?
According to their documentation here you will need to authenticate users on behalf of your application if you want to access their media and other information. So to put this in other way it doesn't look possible to retrieve their media just by entering a URL without any authentication.