use AWS_CONFIG_FILE if defined

[gumieri]

The option --set-ini assume the ~/.aws/config aws the only possible location for the config file, but there's a environment variable to change it: https://docs.aws.amazon.com/cli/v1/userguide/cli-configure-envvars.html#envvars-list (AWS_CONFIG_FILE).

Some people (like me) may use this to place the AWS config based on the standard "XDG Base Directory" (~/.config/). By ex.: AWS_CONFIG_FILE=$HOME/.config/aws/config.

[iann0036]

Hey @gumieri,

Thanks for raising! I've added the code to respect the environment override if defined. It'll be in v1.1.10 or on main.

Let me know if you have any issues with it.