Unity3d expert for Facebook, Gmail, Twitter Invite Friend Functionality

Project Description:

I have a Unity3d project and I am going to include Invite/Challenge functionality to this game.

I want solution for iOS and Android because my game is for both of Android and iOS.

1.Login

-User will log into the game via Facebook, Gmail, Twitter.

So u want to get username,user ID & email address of Facebook,Twitter & Gmail.

2. Indicate the friends list

User will select the friends to send invitation from the Friend list.(Multiselection, checkbox)

So u want to get the friends list from Facebook,Twitter.

And then you need to get Contacts from google.

3.Send invitation to selected friends.

I am sure that experienced developer will complete this task within 3 days.

Skills required: Unity 3D