Getting Error: AADSTS7000218: The request body must contain the following parameter: 'client_assertion' or 'client_secret'

[fuad47]

Embed Power BI for customers - sample embed error
I am trying to setup Embed Power BI for customers. I have setup all credentials in config.py file under AppOwnsData folder, completed all steps mentioned in documentation. Authentification mode is 'MasterUser'. When I run that flask app ('flask run'), I get this error in the browser:
AADSTS7000218: The request body must contain the following parameter: 'client_assertion' or 'client_secret'.
this tip may help: according to my investigation, in aadservice.py file this line returns empty list:
accounts = clientapp.get_accounts(username=app.config['POWER_BI_USER'])-->returns empty list.

Server runs at address http://127.0.0.1:5000/ .
Azure authentication settings are as follows:

---

Document Details

⚠ Do not edit this section. It is required for learn.microsoft.com ➟ GitHub issue linking.

• ID: 54016cab-2de5-0d30-2dfa-ee386dcfb881
• Version Independent ID: 4e464b91-bc16-270d-cd51-9bfa396c0326
• Content: Embed content in your Power BI embedded analytics application - Power BI
• Content Source: powerbi-docs/developer/embedded/embed-sample-for-customers.md
• Service: powerbi
• Sub-service: powerbi-developer
• GitHub Login: @mberdugo
• Microsoft Alias: monaberdugo

[PesalaPavan]

@fuad47
It would be great if you could add a link to the documentation you are following for these steps? This would help us redirect the issue to the appropriate team. Thanks!!

[fuad47]

@PesalaPavan The link for documentation that I use: https://learn.microsoft.com/en-us/power-bi/developer/embedded/embed-sample-for-customers?tabs=python#client-id

[PesalaPavan]

@fuad47
Thanks for your feedback! I've assigned this issue to the author who will investigate and update as appropriate.