No, like most database systems, MySQL has its own security & user privileges. you need to grant privileges to specified users before they can use MySQL.
If you search on this thread for the error message you quoted you will find the answers to what you want. The problem is going to be to ensure that you know the main system user account and password. Usually its all covered in the MySQL installation process. Assuming that you didn't follow all the steps on the installation your system user account will be root and the password wlll be empty.