global class KapUserCleanUp implements Database.Batchable<sObject>{

    datetime myDateTime = datetime.now();
    datetime newDateTime = myDateTime.addDays(-1);
    datetime inactiveDateTime = myDateTime.addDays(-90);

    //System.debug('current time: ' + myDateTime);
    //System.debug('newDateTime time: ' + newDateTime);
    //System.debug('inactiveDateTime time: ' + inactiveDateTime);

global Database.querylocator start(Database.BatchableContext BC){
            return Database.getQueryLocator([SELECT Email,Id,LastLoginDate FROM User WHERE ((IsPortalEnabled = True AND IsActive = true AND CreatedDate = :newDateTime) OR (IsPortalEnabled = false AND isActive = true AND lastLoginDate < :inactiveDateTime AND LastName != 'Site Guest User'))]);}

global void execute(Database.BatchableContext BC, List<User> users){
   System.debug('Users retrieved ' + Users);
   
   for (User u : users) {
       u.isActive = false;
       System.debug(u.id + ' ' + u.email + ' will be deactivated' + u.lastLoginDate);
   }
       Database.SaveResult[] srList = Database.update(users, false);
          for (Database.SaveResult sr : srList){
             if (!sr.isSuccess()) {
             //Operation failed, so get all errors
                for(Database.Error err : sr.getErrors()){
                     System.debug('The following error has occurred.');
                     System.debug(err.getStatusCode() + ': ' + err.getMessage());
                } 
             }  
          }
    }
   global void finish(Database.BatchableContext BC){
       }
   }