how to hide src of an iframe embed to stop external sharing

[NMTL22]

I'm wanting to post PowerBI dashboard behind my paywall of my site, what i'm looking for is a way to hide the source url location within the iframe to stop users from being able to take the source and look at the dashboard externally. 

<iframe title="Test dashboard" width="1140" height="541.25" src="https://app.powerbi.com/reportEmbed?reportId=35" frameborder="0" allowfullscreen="true"></iframe>

At the moment if they look at the website source, they can copy the link and post it publically elsewhere.

Could anyone let me know if this is possible.

Thanks in advance