When I use Twitter API in mysite for user login with Twitter, sometimes the Twitter API call the callback url multiple time.
After the first callback success & my system continue to process the user to log in my site,
It redirect again to the callback url.
(Ex: sns/twitter/redirect?oauth_token=TXyqXgAAAAABaW5RAAABg_FmW28&oauth_verifier=ExTBoyAU2BH3fSBBq07s5CmlAxIG70CT)
Because the token can be used twice, so the error occur.
Could anyone help me to answer that what the situation the callback is call multiple time ?
Thank you all & sorry for my bad English.
