After I cleared all records from my user database table, my application stopped working. I keep getting OAuth2 authentication errors in the logs. The main error shows ‘invalid_grant’ when trying to get the access token. There’s also a database error saying the refresh_token column cannot be null. This causes a fatal PHP exception that crashes the application. The error happens in my authentication handler when it tries to create or update user records. How can I fix this issue and get my app running again?
This exact thing happened to me during a production deployment that went sideways. Here’s what’s going on: your OAuth2 provider still has active authorizations for users that don’t exist in your database anymore. When OAuth tries to exchange tokens, it crashes because there’s no user record to validate against. First, you need to invalidate all existing OAuth2 authorizations on your provider’s side. For the refresh_token null constraint, temporarily modify your database schema to allow null values or just set a default empty string. Once you’ve done both, users can go through OAuth again and everything should work fine. The auth handler will create fresh user records with new tokens when they re-authorize.
The invalid_grant error occurs because the OAuth2 tokens no longer correspond to records in your database after the cleanup. Since the user table is empty, any previously stored tokens are invalid. To resolve this, revoke all existing OAuth2 sessions and require users to log in again. Regarding the refresh_token being null, you can either adjust your database schema to allow null values or modify your authentication handler to insert a default value for new users. I encountered a similar issue during a user data migration last year, and clearing client-side sessions while addressing the database constraints was the quickest solution.
ya, when u clear the db it messes up oAuth stuff for sure. try to clear the permissions and then log back in. also check that refresh_token can be null or something for now - it might help with the whole auth issue.