[keycloak-user] Import User Passwords with User Storage SPI

Hello everyone, We're currently migrating to Keycloak. We're using the user storage SPI ( https://www.keycloak.org/docs/latest/server_development/index.html#import...) with the import strategy. Eventually, we will unlink all our users and no longer need the user storage SPI. The problem is: 1) We really want our users to keep their same passwords and 2) we don't store passwords in plaintext. We store them as salted hashes, using a different algorithm than Keycloak. We verify the password by performing that 1-way hash on a user's supplied password, then comparing the result against the hash in the database. Reverse-hashing our user's passwords into plaintext and importing users through the REST API or JSON file is not a solution for us. It seems there is no interface to store passwords in Keycloak's local storage after you have verified the user's password, although you can store other attributes locally. I thought there was a way to migrate users with passwords, partly because I read articles that promised you could ( https://tech.smartling.com/migrate-to-keycloak-with-zero-downtime-8dcab9e...) before we chose Keycloak. I now realize that article (and accompanying code) are out of date. My next plan is to try some hacky code, or calling the REST API from the user storage SPI. I don't have a lot of hope those will work. I imagine this is a common issue. Is there any solution or workaround? Thanks, Omari