1. Go to the certificates page in Apple Developer website.
  2. Click on the + button to create a new certificate
  3. Select "Apple Push Notification Services (Sandbox & Production) and click on Continue
  4. Choose the App Id with the same id as the one shared by nunify Team and click Continue
  5. Click on Choose File and select the "NunifyPushCert.certSigningRequest" file sent to you by the nunify team and then click on Continue
  6. Click on Download and send this file back to nunify Team.