Different dataset and dashboards according to different user credentials

Hello,

I am working in a project where I have suggested the use of PowerBI

The requirements are the following:

1) the created dashboard should load data from different Databases source based on the logged in User. Each User has its own Database. Should I create a unique dashboard for each user? How Can i configure it automatically for x number users? 

2)Some of the created dashboards need to load data from the same DataSet but they should be able to see only their own data, so it is also based on the logged in user

I am not sure I can achieve this with RLS.

 
The Databases have the same datamodel, so basically the dashboard will continue to work based on the same data. How can this be achieved? Is there any good solution architecture I should consider?

Thanks for your help.