function generateOTP(length) {
    const digits = '0123456789';
    let otp = '';
    otp += digits[Math.floor(Math.random() * 9) + 1]; // first digit cannot be zero
    for (let i = 1; i < length; i++) {
        otp += digits[Math.floor(Math.random() * digits.length)];
    }
    return otp;
}

module.exports = { generateOTP };