thymecrunch/src/main/java/com/example/demo/service/OtpUtil.java

package com.example.demo.service;

import java.security.SecureRandom;

public class OtpUtil {
    private static final SecureRandom random = new SecureRandom();
    
    public static String generateOtp(int length) {
        StringBuilder otp = new StringBuilder();
        for (int i = 0; i < length; i++) {
            otp.append(random.nextInt(10));
        }
        return otp.toString();
    }
}