Allow for passing of user credentials in env vars.

[ColinSullivan1]

Allow for passing private user credentials through an environment variable for operating in Kubernetes, passing to containers, etc.

e.g.
export SYS_ACCT_CREDS="eyJ0eXAiOiJqd3QiLCJhbGci...."

and optionally:

export SYS_ACCT_JWT="eyJ0eXAiOiJqd3QiLCJhbGci...."
export SYS_ACCT_SEED="SUAIBDPBAUTWCWBKIO6XHQNINK5FWJW4OHLXC3HQ2KFE4PEJUA44CNHTC4A";

This UserCredentials option is a good starting place for building callbacks that would read env vars.

/CC @davidkemper @bwerthmann

[bwerthmann]

IMHO, reading secrets from the env is an anti-pattern.

risk unintentional information exposure. Shell variables are often logged, passed down to child processes, or leaked to error reporting services without your knowledge.

https://www.cloudsavvyit.com/12631/how-to-secure-sensitive-data-with-docker-compose-secrets/
https://kubernetes.io/docs/concepts/configuration/secret/

thoughts?