Get instance settings

Get instance settings
sendDelay : Delay in seconds between sending message, Default 1 second
webhook_url : Http or https URL for receiving notifications .
webhook_message_received : on/off notifications in webhooks when message received .
webhook_message_create : on/off notifications in webhooks when message create .
webhook_message_ack : on/off ack (message delivered and message viewed) notifications in webhooks.
webhook_message_download_media : on/off to get received document / media files.