public class JourneyHandler {
    public static void journeyHandlerMethod(Map<Id, Player__c> oldPlayers, Map<Id, Player__c> newPlayers){
         List<Messaging.SingleEmailMessage> mailList = new List<Messaging.SingleEmailMessage>();
        
        for(Player__c play : newPlayers.values()) {
            Player__c oldplay = oldPlayers.get(play.Id);
            
            // Check if 'Country__c' field is updated
            if(oldplay.Country__c != play.Country__c) {
                // Create a new email
                Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
                
                // Set the recipient email address
                mail.setToAddresses(new String[] {play.Email__c});
                
                // Set the email subject
                mail.setSubject('Country Change Notification');
                // mail.setTemplateId(emailTemplate.Id);
                
                // Set the email body
                mail.setPlainTextBody('Dear ' + play.Name + ',\n\nYour country has been updated from ' + oldplay.Country__c + ' to ' + play.Country__c + '.\n\nBest,\nYour Team');
                
                // Add the email to the list
                mailList.add(mail);
            }
        }
        
        // Send all emails in the list
        if(!mailList.isEmpty()) {
            System.debug('Mail sent ');
            Messaging.sendEmail(mailList);
            
        }
    }
}