Login to your Crent account and go to Settings > Notifications to setup what type of notifications you will be receiving as well as notification methods. You can select from email notification, text notification or iPhone app push notifications. You can select more than 1 option.
Please note: that you can not stop completely all messages from Crent. There are some cases when we will still send email or text message for your security, for example identity verification, password reset or some urgent account notifications you need to be aware of. These events are rare and not managed via Notification Settings.
The only way to cancel all communication with Crent is to delete your Crent account.