Which page is the starting one

Many thanks. For the problem below, when opening thishttp://localhost/phpmyadmin/

How can I put any password as my root account is with one password?

Welcome to phpMyAdmin

Error
MySQL said:

#1045 - Access denied for user ‘root’@‘localhost’ (using password: NO)

Connection for controluser as defined in your configuration failed.
phpMyAdmin tried to connect to the MySQL server, and the server rejected the connection. You should check the host, username and password in your configuration and make sure that they correspond to the information given by the administrator of the MySQL server.

Open new phpMyAdmin window

By the way, after I’ve created one new user there on the DB (using Mysql), how can I connect to it in the prompt, that is called ‘Mysql command line client’?