Store api key in keychain or credential manager instead of plaintext

[kunisen]

Overview

Per a discussion with @rseldner we noticed ecctl stores API key in plaintext.
This is insecure.

Possible Implementation

We would propose to store key in keychain (macOS) or credential manager (WinOS), etc.
If hard, then avoid saving it in $HOME/.ecctl/config.json, but let user specify it in env variables or bash_profiles, to reduce risk.

Testing

n/a

Context

given api key is extremely important to ops the deployment, we should keep it safe and secure

Your Environment

macOS