keepassxc entry

keepassxc returns structured data for entry using keepassxc-cli.

The output from keepassxc-cli is parsed into key-value pairs and cached so calling keepassxc multiple times with the same entry will only invoke keepassxc-cli once.

!!! example

```
username = {{ (keepassxc "example.com").UserName }}
password = {{ (keepassxc "example.com").Password }}
```