### Summary ** Notify when Down ** - Before the downtime period, The system should send an SMS message to customers to not use the application in the next minutes. - Downtime will only be allowed 2 hours a week in total until the issue is fixed as the upgrade is done, the system will be processing a volume of 100,000 transactions within a day on average with a peak reaching 200,000. - SMS Message will be: ``` NijPay system will be down for the next 30 minuites, please do not to use the application and its services until then. ``` ### Acceptance Criteria - [ ] Verifying that the overall time will be only 2 hours a week - [ ] the system SMS message to be exactly as requested ### Relevant documents, screenshots, references and/or links