Don't store credentials in settings file

[dadoonet]

Discussed in #1914

^{Originally posted by abertolli August 10, 2024}
Is there a way to import an external file for credentials (in my case, elasticsearch preferably with the API key)? We would like to have our fscrawler _settings.yml file in version control, but do not want that to contain credentials. So far the only way I can tell to do this with the documentation is to hack around using --username and then use redirects to send the information on the commandline from another file.