Question about Navicat software

[Xiaoxiao]

I accidentally deleted the users under 'users' for the Navicat program, and now for my site when you try to login it goes to an error code.  Did I just make an awful mistake?  I was just trying to delete the users and log back in again so their aren't so many saved users that has access to the database (I've had several developers help me in the past).

Thanks!