Jenkins Add permissions to folder using groovy

Question

I need to add some permissions (Read, Build, View, cancel etc) to multiple users at the same time.

def users = [user1, user2]
    for(user in users){
       String userID = user;
       jobDsl scriptText: """
           folder('example') {
             properties {
               authorizationMatrixProperty {
                 inheritanceStrategy {
                   inheritingGlobal()
                 }
                 permissions(['hudson.model.Item.Read:authenticated',
                      'hudson.model.View.Read:authenticated',
                      'hudson.model.Item.Build:${user}', 
                      'hudson.model.Item.Read:${user}'
                       .
                       .
                       .
                 ])
              }
            }
          }
       """
     }

When running this, it first adds user1, then for the second time removes user1 and overwrites user2. How can I add permission access to both the users at once?