The Client ID for the app you registered.
Before you register an app for Power BI, you need to Sign up for Power BI.
Step 1
Go to dev.powerbi.com/apps.
Step 2
Click Sign in with your existing account, and sign into your Power BI account.
Step 3
Enter an App Name such as "Sample push data app".
Step 4
For App Type, choose Native app.
Step 5
Enter a Redirect URL, such as https://login.live.com/oauth20_desktop.srf. For a Native client app, a redirect url gives more details on the specific application that it will authenticate. The standard Url for a client app is https://login.live.com/oauth20_desktop.srf.
Step 6
For Choose APIs to access, choose Read and Write All Datasets. For all Power BI app permissions, see Power BI Permissions.
Step 7
Click Register app, and save the Client ID that was generated. A Client ID identifies the app in Azure AD.