feature: add --auth-string flag to auth

[shivamdurgbuns]

Checklist:

• I've searched for similar issues and couldn't find anything matching
• I've discussed this feature in the #k8sgpt slack channel

Is this feature request related to a problem?

• Yes
• No

Upon usage I have seen that in order to provide the API key using auth command we have to pass input to the prompted line

Describe the solution you'd like

I am suggesting to have an extra flag names --auth-string, that could be used to provide API to auth command into the same line.

Benefits for the project and its users

This will benefit in places such as CI/CD or any scripts where we have to single the key in the same single line command rather than waiting for input, we can directly pass the secret in the same line.

[shivamdurgbuns]

I would be working on this one, so please assign it to me. Thank you :)

[AlexsJones]

I think this could be useful, thanks I will add it to the issue backlog

[AlexsJones]

I would recommend we use something more standard like --password-from-stdin or --password

[matthisholleville]

@shivamdurgbuns I am working on an integration with GitLab CI, so I also needed this functionality. I have submitted a merge request. I hope you haven't started anything on your end? 😞

[shivamdurgbuns]

@shivamdurgbuns I am working on an integration with GitLab CI, so I also needed this functionality. I have submitted a merge request. I hope you haven't started anything on your end? 😞

Oh! I had started working on, but your pr looks ok. You should have waited a little I was about to test and push those changes.

[matthisholleville]

Sorry. I'll contact you upstream next time.