Sends a push notification to a user.
The Send-CIPPPush function sends a push notification to a user specified by their email address.
The ID of the customer's tenant.
The email address of the user to send the push notification to.
PS > Send-CIPPPush -CustomerTenantID "7ced1621-b8f7-4231-868c-bc6b1a2f1778" -UserEmail "user@example.com"