reflect change to signature of _get_user_urn; ensure slice_cred is unwrapped if we got a struct and this is APIv2
reflect change to signature of _get_user_urn; ensure slice_cred is unwrapped if we got a struct and this is APIv2

ahelsing/geni-tools,plantigrade/geni-tools,tcmitchell/geni-tools,plantigrade/geni-tools,ahelsing/geni-tools,tcmitchell/geni-tools