In my app, I want to allow visitors to try a few functionalities of the app before creating an account. At some point in the process they will be asked to create an account if they want to store their progress.

To achieve this, I need to create a new User record when someone starts this process, so their activity can be retained on their profile if they decide to create an account. Is this possible to do with fastapi-users? Any ideas on how to implement this? Here is what I'm thinking of:

1. Create a temporary user record: When a visitor starts using the app, create a new User record with a flag indicating it's a temporary account. I can do this without requiring the usual registration process.
2. Associate actions with the temporary user: Use this temporary user record to associate the visitor's actions and progress.
3. Convert to a permanent account: When the user decides to create a full account, update the existing temporary user record with the new information instead of creating a new one.

But I'm not sure what would be the best way to implement the step 3, specially with oauth. Any help on this is appreciated.