PowerBI with OneDrive Personal as data source - Is it safe?

Hello guys,

I'd like to connect di PowerBI with an Excel file stored on OneDrive personal, and I found this great post on this community:

https://community.powerbi.com/t5/Power-Query/PowerBI-support-for-OneDrive-Personal-as-data-source/td-p/129125 

The solution is to use the "Embed" function and then use a link in PowerBI to create the connection:

https://onedrive.live.com/downloadresid= AAXXXX&authkey=AAXXXXXXX&em=x&app=Excel

My question is: Is this solution safe? Or anyone could fetch the link and see my data from the file on OneDrive? Because this solution does not require any login.

Thank you for your help!