Importing users over time

[dan]

I have a large number of users. I want to import them into FusionAuth with their password hashes and the accompanying data like the factor.

But my cutover is going to be slow, so I expect some percentage of people to change their password hashes after the import.

So I'd like synchronize any password hashes that changed in the meantime, and then roll out FusionAuth.

I can't re-import password hashes for an existing user, and the User API doesn't let me update passwords hashes, per this closed issue: https://github.com/FusionAuth/fusionauth-issues/issues/348

What would you recommend?

[dan]

I think the way I'd approach this is:

• import all users into FusionAuth

At cutover time:

• look at local database to see which password hashes had changed
• pull the user data from FusionAuth for each of these users
• delete the user
• re-import the user with the new password hash and the FusionAuth data, maintaining the same userId (if you provide the UUID, we'll use that)

I get that is an additional complexity, but hopefully that helps.