[source,bash]
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$ curl 'http://localhost:8080/group/v1/groups/t7r2iJxzq957elzLHGdoa7JDedy2h0sQ/members' -i -X PUT -H 'Accept: application/json' -H 'Content-Type: application/json' -d 't7r2iJxzq957elzLHGdoa7JDedy2h0sQ'
----