How can I copy an AMI to another account using Packer?

I have two AWS Accounts:

1. Test Account
2. Prod Account

I am creating an AMI using Packer in the Test Account and want to copy the AMI to the Prod Account after that.

How can I use Packer to do that and also remove the actual AMI after the job is done?

I already checked following questions but they didn't resolve my query:

1. How do I bulk copy AMI AWS account number permissions from one AMI image to another?
2. how to copy AMI from one aws account to other aws account?