Changes to List Chat Connections

added the required property offers/items/auth_provider to the response with the 200 status

added the optional property offers/items/tiers/items/lock_reason to the response with the 200 status

added the optional property offers/items/lock_reason to the response with the 200 status

added the optional property offers/items/tiers/items/display_model to the response with the 200 status

added the optional property offers/items/unlock_href to the response with the 200 status

endpoint added