Connecting to Graph API with Power BI

HI,

I'm trying to obtain a list of users with the Graph API with Power BI. The URL I'm using is https://graph.microsoft.com/v1.0/users and I'm following the steps from https://minkus.medium.com/easily-connecting-between-power-query-power-bi-and-microsoft-graph-72333eb95a35 to connect. But I'm getting the following error when I tried to connect with Power BI Desktop:

I tried to use a custom connector (example is at https://github.com/cristianoag/PowerBIGraphCustomConnector). It prompted me to sign in, but I'm getting the error below:

I searched around to see whether I could find another way or if something else I need to do, but I couldn't find anything. I was wondering if there's another way to connect to Graph API with Power BI? Or if there's an extra step I missed when I used the 2 techniques above.

Jason