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user group affiliation

2 answers

MIlan,
It can be done via JTS REST API for each user serately. If You have user id You can send request to:
https://server/jts/service/com.ibm.team.<wbr>repository.service.internal.<wbr>IAdminRestService/<wbr>contributorByUUID?uuid=XXX</pre>
Where XXX is your the user uuid for which you want to get data.