These methods are available if the daemon is started anonymously (without an explicit `-u USERNAME`).
Requests are sent to `/org/asamk/Signal`; requests related to individual accounts are sent to
`/org/asamk/Signal/_441234567890` where the + dialing code is replaced by an underscore (_).
-Only `version()` is activated in single-user mode; the rest are disabled.
+Only `version()` is activated in single-account mode; the rest are disabled.
link() -> deviceLinkUri<s>::
link(newDeviceName<s>) -> deviceLinkUri<s>::