maybe ldap or other feature could help me? thinking about a new auth_plugin for example, there's something that is near to what i need? like
setup mysql database in all servers
setup auth plugin in all servers pointing to some 'master database with users', any grant or auth will be done there and my current server will say ok you are in, (what i'm saying now is near mysql tables replication + some plugin)
thinking again... could replication be used in mysql tables? allowing a automatic flush privileges when something change?