MyBB Community Forums

this has been posted by others 
Error
There seems to be one or more errors with the database configuration information that you supplied:
Could not connect to the database server at 'localhost' with the supplied username and password. Are you sure the hostname and user details are correct?
Once the above are corrected, continue with the installation. 

I have read many answers on this topic and have tried numerous suggestions. Password login info all check out. Xampp seems to be installed properly. I have checked ports etc. Is there not a script or command that can be run from powershell windows 10 that can check configuration?  I have followed installation instructions exactly. Have installed and uninstalled many times. My guess is  its windows related. Any help would be appreciated.

Default configuration of MySQL in Xampp has only root user without password.
Did you create an user for the MyBB database and gave him the access ?

I sometimes use mybb over xampp (win10) to do some quick tests, I never had any trouble with that.

Actually I managed to finally install but don't know how to access mybb forum on localhost.

if you have used htdocs folder directly for the installation then
http://localhost should directly load installed MyBB forum
[of course, you have to start apache server & MySql server before getting localhost]

if a subfolder is used for MyBB installation then use http://localhost/subfolder

Edit: watching a couple of youtube videos might help [mybb+xampp+youtube search results]