provide password from file or environment variable

[alperyilmaz]

Describe the bug
I'm using gpclient cli within docker container. For more automated use, I need to provide the password from file (or environment variable) but I cannot do that right now, I need to enter the password in interactive TTY. When I searched previous issues, found one about credentials being saved but couldn't figure out how to use it to solve my issue.

Expected behavior
Using a commandline argument to provide a filename or environment variable which contains password so that gpclient can be more scriptable without user intervention

Environment:

• OS: Ubuntu 22.04 (within docker)
• Desktop Environment: none
• Is remote SSH? Yes

[yuezk]

Currently, the username can be passed via the -u option, while the password must be from the user input. I will evaluate if it is possible to read the password from the std in. So usage like echo "$PASSWORD" | gpclient connect <portal> -u user could work.