Automated Reminders for Jenkins-ADO PAT token expiry

My task is to send email notifications to people in the company when the azure devops Token expires before 7 days. ANd we store token in Jenkins credentials , we need to get the date field from the description and then calculate the date difference (Today - when token expire) . we already have some scripts related to this we need to modify them.we use Jenkins, Groovy, and shell scripts (bash) .