Is there a way for users to upload user specific data to their own entry in Salesforce (shielded form other users) that the Agentforce AI agent can access. In doing so, the user can interact with their own data. Doesn’t have to be 100% live data.

I want users to be able to upload records of their portfolio to SF environment through our website (log-in) that AI agents can access. In doing so, said users can interact with their own data. 

Key is that I don’t want users to have to log in twice (once on our portal and second on a SF environment). We aren’t Salesforce native at this moment in time and I want to explore options in which we don’t have to do that (go SF native). We don’t have the budget to rebuild our system at the moment. 

Any thoughts?