Flask cors issue

[SinghAbhinav04]

Hey guys , I have been stuck over this Cors issue in Flask .. basically I have hosted my Flask backend on Railway and I am trying to Access via my localhost and all I get is =>

Error:
Access to fetch at 'https://test.up.railway.app/auth/login' from origin 'http://127.0.0.1:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: It does not have HTTP ok status.Understand this error

Please find my script below :

from dotenv import load_dotenv
load_dotenv()
from flask import Flask
from flask_cors import CORS
import os
import sys

app = Flask(name)

CORS(app)
@app.before_request
def before_request():
headers = {'Access-Control-Allow-Origin': '*',
'Access-Control-Allow-Methods': 'GET, POST, PUT, DELETE, OPTIONS',
'Access-Control-Allow-Headers': 'Content-Type'}
if request.method.lower() == 'options':
return jsonify(headers), 200

@app.route("/", methods=["GET"])
def get_hey():
print("Root endpoint hit!")
return "hey from Koma", 200

try:
from routes.auth import auth_bp
app.register_blueprint(auth_bp, url_prefix="/auth")
except Exception as e:
print(f"Failed to import auth blueprint: {e}")

try:
from routes.manga import manga_bp
app.register_blueprint(manga_bp, url_prefix="/koma")
except Exception as e:
print(f"Failed to import manga blueprint: {e}")

if name == "main":
app.run(host="0.0.0.0", port=int(os.environ.get("PORT", 5000)))

Thank You ..