In --no-db mode, load passwords from the users file instead of the
connectors file. This allows us to remove the password infos field
from the local connector and stop loading them during connector
registration, a case that was causing panics when using a real
database (see #286).
Fixes#286Closes#340
The DB implementation expects secrets to be base64 encoded blobs.
Because of this a bunch of tests broke moving to sqlite.
A lot of this commit is fixing those tests.
