android - native twitter connect

Hello,

I'm looking for a way to do native twitter login inside a unity game. to be clear, by native twitter login I mean:

1. the twitter app will pop up and ask for permission. NOT by user giving his username and password.

2. after it I should be able to tweet in the player name (with permission).

3. must work on andoird.

I tried using Soomla (https://www.assetstore.unity3d.com/en/#!/content/24601) but it don't seem to be native on android, eg it ask for my actual twitter username and password instead of popping up the twitter app and ask to give permissions.

any plugins / examples out there that works?

note: my budget is low, so free / cheap solutions are preferred.

thanks!