It is a very common problem when you have many emails and websites. You can solve this problem through little knowledge of the insides of PHPMyAdmin.
Step 1 – Open Cpanel.
Step 2 – If you have PHPMyAdmin password then click on PHPMyAdmin directly but if you do not have PHPMyAdmin password then, click on -> File Manager -> Open wp-config.php -> Copy database username and database password.
Step 3 – Close file manager and go to Cpanel home. Click on PHPMyAdmin and put username, password.
Step 4 – Click on wp-users -> the user you want to change, click edit.
Step 5 – Change the password of “user_pass” at Value and at Function give “MD5”.
Step 6 – Try with Username and password on the website.