Setting up email adapter in AWS bitnami parse

I am really new to parse server. When I am trying to reset user passwords I am getting below error.

{"error":{"code":1,"message":"An appName, publicServerURL, and emailAdapter are required for password reset and email verification functionality."}}

I think I am getting error because I am not setup email adapter.
I searched for a tutorial or documentation about setting up email adapter. But I am fail to find any. Appreciate if someone can help. Thank you in advance.