Preventing original company logging into our App after work is finished

[Pizza_Dubai]

If company A develops an APP for us and then we find a new developer B to do more work on our APP, is there a way we can make sure company A no longer has access to the appsheet account? There seems to be no option to expunge all logged in users like gmail has to be 100% sure.

We can change the password, but we see that company A used the ‘remember me’ option they still have access - Are we hallucinating or is this correct?