fyres Node.js sent login otp gives 500 Internal server error

// Sent Otp URL
FYERS_SENT_OTP_URL=https://api-t2.fyers.in/vagator/v2/send_login_otp_v2

APP_ID_TYPE = 2 // 2 denotes web login
FYERS_ID = YXXXXX2

const axios = require("axios");
require('dotenv').config();
const { FYERS_ID, TOTP_KEY, PIN, CLIENT_ID, SECRET_KEY, REDIRECT_URI, APP_ID_TYPE, FYERS_SENT_OTP_URL, FYERS_VERIFY_OTP_URL, FYERS_VERIFY_PIN_URL, FYERS_TOKEN_URL } = process.env;

async sendLoginOtp(fyId, appId) {
        try {
            const response = await axios.post(FYERS_SENT_OTP_URL, {
                fy_id: fyId,
                app_id: appId
            });
            return response.data.request_key;
        } catch (error) {
            console.error("Error sending login otp with error:", error.message);
            throw new Error("Error sending login otp");
        }
}

async generateToken() {
        try {
            // Send Otp request to fyers API
            let requestKey = sendLoginOtp(FYERS_ID, APP_ID_TYPE);
            
            console.log("Request key",requestKey);
        } catch (error) {
            console.error("Error in generating token", error.message);
            throw new Error("Error generating token");
        }
    }
generateToken();