Support read-only connections - JSON parsing now fails

[dandv]

I have a read-only connection to reporting DB, and trying to show .find() results as JSON fails, probably because the output includes the profile command failing:

Error: profile command failed: {
  "operationTime": Timestamp(1561102597, 1),
  "ok": 0,
  "errmsg": "not authorized ... to execute command { profile: -1.0, ... }",
  "code": 13,
  "codeName": "Unauthorized",
  ...
}