DatabricksFunctionClient : PERMISSION_DENIED when creating the client

[BriceBuso]

Hello, 

I'm currently working with Databricks features to create an AI agent system. 
In the documentation it's written that the library DatabricksFunctionClient is needed to register custom tools to UC.  

I followed the different steps from the explanations but when i want to run the code i'm getting a error.  

SparkConnectGrpcException: PERMISSION_DENIED: Cannot access Spark Connect. 

https://docs.unitycatalog.io/ai/quickstart/

Did you already got this issue ? 

Brice.