Have to build graphql API

Have to make a graphql api which will authenticate user while login through facebook ,google and twitter on our website .so yhat if user click on the button login through facebook then a popup window will display were user will select his account we have to authenticate it and generate the token and the user once logedin should not go through the same process again his data must be stored .
In short we have to make api one is to redirect url and which also authenticate user.