Untitled

public class SendEmailAction {
    public class InputVariables{
        @InvocableVariable
        public Account account;
    }
    @InvocableMethod (label='Send Email notify')
    public static void sendEmail(List<InputVariables> inputVariables){
        List<EmailTemplate> SEEmailTemplate= [Select Id, Name, Subject, DeveloperName, Body from EmailTemplate where DeveloperName= 'Notification_for_New_Account_Assigned'];

        Account passInAccount= inputVariables.get(0).account;
        Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
        
        String emailAddr = [select Email from User where Id = :passInAccount.OwnerId].Email;
        String[] toAddresses = new String[] {emailAddr};

        String plainBody = SEEmailTemplate[0].Body;
        plainBody = plainBody.replace('{!Account.Name}', passInAccount.Name); 

        String subject = SEEmailTemplate[0].Subject;   
        
        mail.setTemplateId(SEEmailTemplate[0].Id);
        mail.setToAddresses(toAddresses);
        mail.setTargetObjectId(passInAccount.OwnerId);
        mail.saveAsActivity = false;
        mail.setPlainTextBody(plainBody);
        mail.setSubject(subject);
        Messaging.sendEmail(new Messaging.SingleEmailMessage[] { mail });
            
    }
    
    
 }