The default ( right after an install, or until you add a password ) login to MYSQL using phpMyAdmin or anything else is :-
Username = root
Password = leave this blank
Press the go button
MySQL always installs with this one account pre created.
The details you tried to use are stored in a cookie, just use the correct login and they will be overwritten.
Once you gain access correctly using the root userid, it is a good idea to put a password on this 'root' account. Remember to add the same password to ALL 3 root accounts
root@localhost
root@127.0.0.1root@::1
Once you add the password, logoff and then logon again using the new password
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(Windows 10 Pro 64bit) (Wampserver 3.3.4 64bit) Aestan Tray Menu 3.2.5.4
<Apache versions MULTIPE> <PHP versions MULTIPLE> <MySQL Versions MULTIPLE>
<MariaDB versions MULTIPLE> <phpMyAdmin versions MULTIPLE> <MySQL Workbench 8.0.23>Read The Manuals Apache --
MySQL --
PHP --
phpMyAdminGet your Apache/MySQL/mariaDB/PHP ADDONs here from the
WAMPServer alternate Repo-X-X-X-
Backup your databases regularly Here is How dont regret it later! Yes even when developing -X-X-X-