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somtime I cannot authenticate by Owin at first login by facebook
I used OWIN Auth to authenticate on my asp.net mvc 5 website. It run great on localhost, i can login and get user's info from facebook. However, I have a bug when run on IIS server. Sometime, I can't login, cannot get loginInfo from method
It return NULL. I must re-login then success. I viewed, it logined on second-time.
I research many time on internet , but i still cannot found solution for this issue. Can you help me resolve it?
Pls, reply information as soon as possible ! Thanks so much.