I am trying to make Facebook Login in my app,but I have a misundertanding here.

[![enter image description here](https://i.stack.imgur.com/ehlyl.jpg)](https://i.stack.imgur.com/ehlyl.jpg)

[![enter image description here](https://i.stack.imgur.com/z2qXM.jpg)](https://i.stack.imgur.com/z2qXM.jpg)

Do I need to download Facebook SDK,if I am importing it in the second part?If yes how should I **import the Facebook SDK packages**

Thx.