[DOC] Uniqueness of groups and devices

[mapedraza]

Is this correct?

iotagent-node-lib/doc/api.md

Lines 162 to 167 in c57d892

	### Uniqueness of groups and devices
	Group service uniqueness is defined by the combination of: service, subservice and apikey
	Device uniqueness is defined by the combination of: service, subservice, device_id and apikey. Note that several devices
	with the same device_id are allowed in the same service and subservice as long as their apikeys are different.

Is not group defined by apikey and resource?
Devices by device_id and apikey?

CC: @fgalan @AlvaroVega

[AlvaroVega]

According with model/Group.js and lib/services/groups/* Group service uniqueness is defined by the combination of: service, subservice, resource and apikey .
I don't why ;-) but I've always use default resource, but it`s possible to use different resources.
Device uniqueness is as described: service, subservice, device_id and apikey.

[fgalan]

Should this issue be closed after the merge of PR #1639 ?

[mapedraza]

Yes, it is solved after #1639