Failed to find PROJECT_CONNECTION_STRING in Azure AI Foundry

Hi,

I'm trying to follow the document to use Azure AI Foundry SDK client (python).

https://learn.microsoft.com/en-us/azure/ai-foundry/how-to/develop/sdk-overview?pivots=programming-language-python

(Note that the code in the document didn't mention about "conn_str")

But I got error:

TypeError: AIProjectClient.from_connection_string() missing 1 required positional argument: 'conn_str'
 

How to find the project conn_str?

Here is what I did:

1. I've created a Foundry project (I knew there are two types of projects, the project type in this case is "Foundry project").
2. az login successfully
3. pip install azure-ai-projects azure-ai-identity
4. Find my project endpoint on Azure AI Foundry portal
5. Run the following code

import os
from azure.ai.projects import AIProjectClient
from azure.identity import DefaultAzureCredential

project_endpoint = "https://pj-kk-250526-1458-resource.services.ai.azure.com/api/projects/pj-kk-250526-1458"
credential = DefaultAzureCredential()
project_client = AIProjectClient.from_connection_string(
    credential=credential,
    #conn_str=""
    endpoint=project_endpoint
)

The error:

Traceback (most recent call last):
  File "/workspace/Azure_Agent/1_Grounding_with_Bing_Search.py", line 24, in