I've been working with Yahoo OAUTH API these days and facing a weird situation:
My web app asks authorization to the user. The user accepts and give asked permissions. Then, let's suppose, he closes the browser and at another time, he opens it in my web site again. I call Yahoo OAUTH API again but, instead of automatically understand that the user already gave me the permission and redirect to my page, Yahoo shows the "User Authorization Page" again. The code is the same and so is my request.
Do you guys know why and what should I do to avoid that annoying behaviour?
By the way, I'm working with Google, LinkedIn and Facebook the exatctely same way and all is fine.