REST API uses userExternalId

[tomas-knap]

user may be confused which id he should use, because such IDs is not visible anywhere - it is set up to be equal for new users as the userID, but if the user changes its ID, the externalIDs remains as it was before, which is a bit confusing.

Propose solution/adjust API

[tomas-knap]

Also by default, with new database, the external ID for user "John Admin" is http://www.johnadmin.cz, which is not visible anywhere. Change to the userID?

[tomas-knap]

Fixed in 3.0 in a way that for new installations, externalID is the same as userID. For custom users equal to userID.
Missing:

• When userID is changed, change also userExternalID.
• Name of the param "userExternalID" is a bit confusing - use "userID" instead

[tomas-knap]

It was already fixed by #629