API(web) as Refreshable data source

[Destined]

Need help from the local Gurus. 
I have the following connection in PowerBI desktop version to get data from an API source. With an anonymous authentication. 

= Json.Document(Web.Contents("https://mysource/statistics/tenant/monthly", [Headers=[#"X-API-Key"="Mykey21123123"]]))

However, when I published this to PowerBi web, I can no longer refresh the data. When configuring test connection, i receive the 400 error. "Failed to update data source credentials: The credentials provided for the Web source are invalid." 

Is there a way to fix it? (I've been going through the forum for the whole day, and couldn't resolve this). 

[Anonymous]

Hi  @Destined ,

This is the related document, you can view this content:

Solved: Failed to update data source credentials: Web.Cont... - Microsoft Power BI Community

Solved: DataSource.Error: Web.Contents failed to get conte... - Power Platform Community (microsoft....

https://stackoverflow.com/questions/75545609/powerbi-service-reading-from-rest-api-through-data-gate...

Best Regards,

Liu Yang

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