saikumarn
Your right I am, because the installing the SDK documentation doesn't tell you thats where the file is 🙂
Indeed I would go so far to say it actually tells you to clone the git repo and then in this directory find the env.local file !
Clone your community's plugin repository from GitHub into a local directory (for example, ~/development/plugin/exampleco)
Locate the file named .env.local in this directory. If you don't see it, note that the file may be hidden by default by your OS (Mac, Windows).
I actually have no idea where the sdk files are, any ideas? If you can provide guidance that would be helpful but I think this should be in the documentation 🙂