Basicaly what im trying to do is create a Desktop app for create folders inside a shared folder from other account (ONE DRIVE) and send this new folder created with some files in it to the shared folder with python

What i did according to API App Registration AZURE is create a new register, all done, create the Secrets and Certs section and all this stuff i thinks is all good and done.

But in code what im did was this by now:

import tkinter as tk
from tkinter import filedialog, messagebox
import requests
import os
import msal

# Configuration - replace with your Azure app details
CLIENT_ID = 'XXXXXXXXXXXXXXXXXXXXXXXXX'
CLIENT_SECRET = 'XXXXXXXXXXXXXXXXXXXXXXXXX'
TENANT_ID = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'
AUTHORITY = f'https://login.microsoftonline.com/{TENANT_ID}'
SCOPE = ['Files.ReadWrite.All', 'Sites.ReadWrite.All']
GRAPH_API_URL = 'https://graph.microsoft.com/v1.0'

# Initialize MSAL
app = msal.ConfidentialClientApplication(
    CLIENT_ID,
    authority=AUTHORITY,
    client_credential=CLIENT_SECRET
)

def get_access_token():
    result = app.acquire_token_for_client(scopes=SCOPE)
    return result.get('access_token')

def get_shared_folder_id(shared_folder_url):
    access_token = get_access_token()
    headers = {
        'Authorization': f'Bearer {access_token}'
    }
    response = requests.get(f'{GRAPH_API_URL}/sites/root/shared', headers=headers)
    if response.status_code == 200:
        items = response.json().get('value', [])
        for item in items:
            if item['webUrl'] == shared_folder_url:
                return item['id']
    return None

def create_folder(folder_name, parent_id):
    access_token = get_access_token()
    url = f'{GRAPH_API_URL}/drives/{parent_id}/items/root/children'
    headers = {
        'Authorization': f'Bearer {access_token}',
        'Content-Type': 'application/json'
    }
    data = {
        'name': folder_name,
        'folder': {},
        '@microsoft.graph.conflictBehavior': 'rename'
    }
    response = requests.post(url, headers=headers, json=data)
    if response.status_code == 201:
        messagebox.showinfo("Success", "Folder created successfully!")
    else:
        messagebox.showerror("Error", f"Failed to create folder: {response.json()}")

def upload_folder_to_shared():
    folder_path = filedialog.askdirectory()
    if not folder_path:
        return
    
    shared_folder_url = tk.simpledialog.askstring("Shared Folder URL", "Enter the URL of the shared folder:")
    if not shared_folder_url:
        return

    shared_folder_id = get_shared_folder_id(shared_folder_url)
    if not shared_folder_id:
        messagebox.showerror("Error", "Shared folder not found.")
        return

    folder_name = os.path.basename(folder_path)
    access_token = get_access_token()
    url = f'{GRAPH_API_URL}/drives/{shared_folder_id}/items/root/children'

    for root, dirs, files in os.walk(folder_path):
        for file in files:
            file_path = os.path.join(root, file)
            relative_path = os.path.relpath(file_path, folder_path)
            file_url = f'{url}/{relative_path}:/content'
            with open(file_path, 'rb') as f:
                response = requests.put(file_url, headers={
                    'Authorization': f'Bearer {access_token}'
                }, data=f)
                if response.status_code not in (200, 201):
                    messagebox.showerror("Error", f"Failed to upload {file}: {response.json()}")
                    return
    
    messagebox.showinfo("Success", "Files uploaded successfully!")

# Tkinter GUI setup
root = tk.Tk()
root.title("OneDrive Folder Manager")

# Upload folder UI
tk.Button(root, text="Upload Folder to Shared Folder", command=upload_folder_to_shared).pack()

root.mainloop()

This is what i did and it returns -> messagebox.showerror(“Error”, “Shared folder not found.”)
What am i doing wrong?