| Steps to Reproduce: | 1. Get user's permission for the app. 2.Facebook will add "code" get variable on the url declared on the redirect_uri. 3.Using the "code" variable, generate access_token using this link, https://graph.facebook.com/oauth/ 4.Graph API will generate the access_token just once |
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| Expected Behavior: | You can generate the access token always using the code variable Ive added inside a session variable |
| Actual Behavior: | if you do step 3 again (I don't put the access_token inside the session for security), this error will occur. |
| API/SDK: | Graph API |