Access to Power Automate for B2B users

Hi All,

We have one requirement where we need to send the data from power bi to S3 bucket .

For sending the users selected data dynamically created a Power automate flow  with API post requested and transferred data from Power BI to S3 Bucket.

We  have some B2B users accessing  the report .With in th power bi report, added the power automate visual pointing to a flow which captures the data from the dax expression, and triggers an API post request to store the data in S3 location in a text file.

When providing the access  to B2B users to run the flow getting an error that user is outside of your organization .

Can you help me get this enabled or any other alternate way to achieve this.