Changes to Get the session group's cash account

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

added the optional property trading to the response with the 200 status

added the required property segregated/items/available_native to the response with the 200 status

added the required property segregated/items/available_usd to the response with the 200 status

added the required property segregated/items/pending_incoming to the response with the 200 status

added the required property segregated/items/pending_outgoing to the response with the 200 status

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

added the required property segregated to the response with the 200 status

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

the cash_account/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