manage access security in gcp

[hi_world]

Hello, 

I have a dataset connecting in direct query to gcp. 
We hide some tables for users with using data permission in gcp. 

we dont want to use role in powerbi. 

So users can see tables in powerbi but we want when they try to display fields in visual an error message appears. 

the scenario is going well but the error message is not clear: 

do you have any ideas how to change the error message or another way to manage security in gcp ? 

Thank you

[lbendlin]

what is gcp ?

[hi_world]

Hello @lbendlin 

its a google cloud platform