Facebook app does not provide username
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How to get user's username in v2.0 or later of Facebook's Graph API
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Using Facebook API to invite friends?
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How to let users tag their friends in a Facebook status update posted from a tab on a Facebook page?
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Facebook: send an app invitation
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Social network login or not?
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fetching list of friends using facebook 2.0
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Key hash for Android-Facebook app
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Request email and password Facebook from your app?
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Login failed invalid key error with Facebook SDK
109077
Facebook connect vs existing account - How to link those two?
130980
iOS: How to store username/password within an app?
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How to grant application access for Facebook account
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I can't retrieve my Facebook password
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Posting to a Facebook Page as the Page (not a person)
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Why are some usernames on comments not a link to user profiles?
123886
How can i add facebook SDK to android project?
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How to get instagram user ID/access tocken from iphone app