Azure AD守护程序应用使用Python调用Planner API时返回“The requested item is not found”错误的排查求助

大家好，我遇到了一个棘手的问题，想请各位帮忙排查一下：

我开发了一个Azure AD守护程序应用，想要从指定的Planner中获取任务数据。我已经给这个应用分配了对应的应用权限，但调用Graph API获取计划信息时，一直返回**"The requested item is not found"**错误，我确认使用的Planner ID是正确的，现在不确定是缺少某个权限，还是代码里有问题。

我平时用VS Code运行Python文件，执行的命令是：python application.py parameters.json

我的Python代码如下： #

import sys  # For simplicity, we'll read config file from 1st CLI param sys.argv[1]
import json
import logging

import requests
import msal


# Optional logging
# logging.basicConfig(level=logging.DEBUG)

config = json.load(open(sys.argv[1]))

# Create a preferably long-lived app instance which maintains a token cache.
app = msal.ConfidentialClientApplication(
    config["client_id"], authority=config["authority"],
    client_credential=config["secret"],
    # token_cache=...  # Default cache is in memory only.
                       # You can learn how to use SerializableTokenCache from
                       # https://msal-python.rtfd.io/en/latest/#msal.SerializableTokenCache
    )

# The pattern to acquire a token looks like this.
result = None

# Firstly, looks up a token from cache
# Since we are looking for token for the current app, NOT for an end user,
# notice we give account parameter as None.
result = app.acquire_token_silent(config["scope"], account=None)

if not result:
    logging.info("No suitable token exists in cache. Let's get a new one from AAD.")
    result = app.acquire_token_for_client(scopes=config["scope"])

if "access_token" in result:
    # Calling graph using the access token
    graph_data = requests.get(  # Use token to call downstream service
        config["endpoint"],
        headers={'Authorization': 'Bearer ' + result['access_token']}, ).json()
    print("Graph API call result: ")
    print(json.dumps(graph_data, indent=2))
else:
    print(result.get("error"))
    print(result.get("error_description"))
    print(result.get("correlation_id"))  # You may need this when reporting a bug

我使用的parameters.json配置文件： #

{
  "authority": "https://login.microsoftonline.com/tenant_id",
  "client_id": "client_id",
  "scope": [ "https://graph.microsoft.com/.default" ],
  "secret": "Secret_Client",
  "endpoint": "https://graph.microsoft.com/v1.0/planner/plans/plan_id"
}

注：上面的ID都是占位符，实际运行时用的是真实的租户ID、客户端ID和计划ID。

当前分配给应用的权限： #

尝试了很多次都没解决，希望有经验的朋友能帮忙看看问题出在哪，多谢了！

备注：内容来源于stack exchange，提问作者Brian