keepassxc-cli has no option to open a database which requires a Yubikey challenge.

Expected Behavior

There is no way to use keepassxc-cli with a Yubikey protected database.

Current Behavior

Only passwords and key files are accepted.

Possible Solution

Add a commandline flag indicating what key or slot to use, which will enable Yubikey challenge/response authentication for the command line tool.

Steps to Reproduce (for bugs)

Attempt to open a Yubikey protected database using keepassxc-cli

Context

I am unable to use keepassxc-cli to handle merging or backup exports (which I would then GPG encrypt to an offline key) once a Yubikey is enabled.

Debug Info

$ keepassxc-cli -v
2.3.4

Operating system: Ubuntu Xenial
CPU architecture: amd64
Kernel: 4.15.0-36-generic

Enabled extensions:

• No non-default plugins.