unable to log into dashboard on local host…

I’ve been working on a small wordpress site locally on my mac using mamp. Everything has been working fine until I’ve tried to get it going on a remote server. Changed my username and password settings in my config.php file for the remote server but am unable to get that working. I’ve gone back to my local site to make changes and can’t log in to dashboard now. I changed my config settings back to root, root, localhost but still no luck. Checked for lines and spaces etc. You smart guys out their rolling you eyes-help! Don’t really how to do the command line thing in mysql on MAMP but if this is the problem, please teach me. I’m all eyes!