Joomla. Username and password do not match
Recently UpdatedQuestion: I forgot my Joomla administrator password. How do I reset it?
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Resetting Joomla admin password.
We log in to the Plesk control panel of our hosting account.
From the right-hand menu options, we open the Databases.

We open phpmyadmin.
From the left-hand menu in phpmyadmin, we find the table prefix_users (where prefix will be a name of your choice when Joomla was installed) and click Edit on the table.

We find the entry related to the password, and in the right-hand field, we clear its content.
We write a new password and from the dropdown menu next to it, we select MD5 and save the change by clicking Go on the bottom right.