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I need assistance in developing a join/login/sign in using Google+, Twitter, Facebook and LinkedIn API's.
The idea is that if people visit my website and if they want to see a certain folio page I want them to sign in using the services above to see/access (or to be redirected) to the specific page on my website.
Similar to http://www.mywebcareer.com/ (bottom part).
I don't need the web page design just a functionality so I can implement it on every page. assistance and explanations will be appreciated.