Variables used in license code : notifications.

1. user entity values, for example user.firstName

2. productTitle: the name of the product.

3. productVersion: the current product version number.

4. policyTitle: the policy that the expiring license is associated to.

5. policyVersion: the version number of the policy.

6. daysBefore: the number of remaining validity days.

7. date:expiryDate: the expiration date of the license.