List, show, encrypt and decrypt service credentials. More information: https://www.freedesktop.org/software/systemd/man/systemd-creds.html.
systemd-creds encrypt --name=name path/to/input_file path/to/output
systemd-creds decrypt path/to/input_file path/to/output_file
stdin
:echo -n text | systemd-creds encrypt --name=name - path/to/output
$CREDENTIALS_DIRECTORY
):echo -n text | systemd-creds encrypt --name=name --pretty - - >> service
systemd-creds encrypt --not-after="timestamp" path/to/input_file path/to/output_file