CoAP

FEATURE REQUEST

1. Is there an open issue addressing this request? If it does, please add a "+1" reaction to the
   existing issue, otherwise proceed to step 2.
   No.

2. Describe the feature you are requesting, as well as the possible use case(s) for it.
   Add endpoint for listing User keys to the Auth service.

3. Indicate the importance of this feature to you (must-have, should-have,

We are developing a little demo but lobarocoap can't parse a response with no options. it fails of the following code in /src/coap_options.c

if (srcArr[0] == OPTION_PAYLOAD_MARKER) {
		INFO("- Options must not start with payload marker!\r\n");
		return COAP_PARSE_MESSAGE_FORMAT_ERROR;
}

Other clients like libcoap or coapthon or java libraries have no problem with the packets. And

All activities and triggers need to be reviewed, documented and readme updates.