Changes to List members of a group (non-PII)

added the optional property error/authorization to the response with the default status

added the optional property error/api_client_id to the response with the default status

changed the pattern of the path request parameter group_id from ^grp_[0-9a-hjkmnp-tv-z]{26}$ to ^grp_[0-7][0-9a-hjkmnp-tv-z]{25}$

the data/items/group_id response's property pattern was changed from ^grp_[0-9a-hjkmnp-tv-z]{26}$ to ^grp_[0-7][0-9a-hjkmnp-tv-z]{25}$ for the status 200

the data/items/individual_id response's property pattern was changed from ^ind_[0-9a-hjkmnp-tv-z]{26}$ to ^ind_[0-7][0-9a-hjkmnp-tv-z]{25}$ for the status 200