Go to File > Open report > Browse reports to get the PBIX file from the File Explorer, and it will be added to the report you are currently working on

Go to Options and Settings > Data source settings

Make sure the source is set to https://api.simplesat.io/api/answers, and then click on Edit permissions

Click on Edit on the Edit Permissions pop-up

On the next pop-up, choose Anonymous for the Credential type and set privacy level as needed and click OK/save.

Enter your API key by clicking on Transform data from the top menu bar, then there should be an input area with a fake testing API key. Replace this placeholder with the account API key

Once the API key is entered go ahead and click Close & Apply to run the queries to pull all data from Simplesat for your account

Head over to your Power BI account and go to My workspace

Click on Upload > Browse, then upload the PBIX file

Hover to the left of the newly uploaded dataset to see a ... button, click on that then select Settings

In the Settings page, expand the Data Source Credentials section and Edit Credentials for the currently Erroring web credential set.

Ensure the credentials setting is set to Anonymous with Skip test connection enabled and Privacy as appropriate
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In the Settings page, expand the Parameters section where you can add your Simplesat token, and then click on the Apply button