hello ,here i am going to teach you how to add a plugin that can be used as a authentication tool to login to your website ,it's necessary for a blog or website to have a social login because now a days nobody will be interasted to start a new account and almost everybody hates signup.with social login your clients can login with "facebook","twitter","google","yahoo","openid"etc. in wordpress we implement with the help of a pluggin called social login ,here's the link
1 . install it (those who dont know follow this link to install a wordpress pluggin)
2 . go to the installed list of pluggins
select setting from the sub menu under social login
3. select create a new free acoount if u dont have one.if u have it then plz skip this step
4 . from the new website login with one of your social or plublic accounts like gmail facebook ,twitter.
5 . after login you will be asked to fill a forum like below
6 . fill the forum with your websites url and submitt.they will give u a message of successfull creation of new profile this might take some minutes so dont bother.
7. so after getting the api secret and key go back to your social login pluggins settings in your wordpress websites dashboardand enter the api key and secret there .followed by some email based options sekect them only if you want it.now selct save all changes