Error message for missing libsecret provider

[meator]

Hello, I'm trying to package mailnag for Voidlinux. Your program uses libsecret to manage passwords. It is not possible for me to add a requirement of a libsecret provider (GNOME Keyring, Kwallet...) to the package, due to technical limitations. So the only way the user is notified of a missing libsecret provider is this:

INFO (2021-06-06 18:10:31): Shutting down...
Traceback (most recent call last):
  File "/bin/mailnag", line 141, in <module>
    if __name__ == '__main__': main()
  File "/bin/mailnag", line 127, in main
    daemon = MailnagDaemon(
  File "/usr/lib/python3.9/site-packages/Mailnag/daemon/mailnagdaemon.py", line 57, in __init__
    accountman.load_from_cfg(self._cfg, enabled_only = True)
  File "/usr/lib/python3.9/site-packages/Mailnag/common/accounts.py", line 259, in load_from_cfg
    password = self._secretstore.get(self._get_account_id(user, server, imap))
  File "/usr/lib/python3.9/site-packages/Mailnag/common/secretstore.py", line 45, in get
    return Secret.password_lookup_sync(self._schema, {'id': secret_id}, None)
gi.repository.GLib.Error: g-dbus-error-quark: The name org.freedesktop.secrets was not provided by any .service files (2)

Could you please make this error message more clear for the user?