Access to fetch at 'http://127.0.0.1:5000/account/summary' from origin 'http://localhost:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled. about flask-cors HOT 2 OPEN

def add_cors_headers(response):
    response.headers['Access-Control-Allow-Origin'] = FRONTEND_URL  # Adjust as needed
    response.headers['Access-Control-Allow-Credentials'] = 'true'
    response.headers['Access-Control-Allow-Headers'] = 'Content-Type, Authorization'
    response.headers['Access-Control-Allow-Methods'] = 'GET, POST, PUT, DELETE, OPTIONS'
    return response
    
###

@app.after_request
def after_request(response):
    return add_cors_headers(response)

# Handles preflight requests
@app.route('/', defaults={'path': ''}, methods=['OPTIONS'])
@app.route('/<path:path>', methods=['OPTIONS'])
def options_preflight(path):
    return add_cors_headers(make_response())