mesh-cli holds no credential: it asks the node-engine on its own machine
over a socket, and the node-engine reads the account from the kernel. The
socket's path, the request and the answer are shared by the program and the
node-engine, so they live here once (ADR 0039: a local protocol a module's
program speaks to its runtime). The bus request the node-engine then makes
is the transport's, and stays out of the SDK.
jochen
bfe82315f4