I have built a dashboard that draws data from an Azure SQL database. Several customers' data is stored in the same SQL. I would like to be able to share this dashboard with customers outside my organization, but I only want them to be able to view their own data, not the data of other customers. I investigate row-level security, but it seems this is incompatible with sharing outside of my organization. I also researched sharing a filtered URL, but by changing the URL, a user granted guest access to the app workspace where the dashboard was created can alter or remove this filter. I suspect a solution may be found by embedding the dashboard in a web app or publishing it as an app - I would prefer not to develop a web app as I am completely unexperienced in this.
What would be the best way to: (1) create a login/password system that alters the query or filters on the dashboard based on who logs in OR (2) create a secure and shareable URL that displays the dashboard filtered to display only one customer's data? It can be assumed that the customer will be a Power BI Pro user, but not a member of my same organization.