Resolved Change in database username broke my Wordpress site

[sw2022]

Please help! I understand zero from Plesk or Wordpress. I have a site on Plesk and I thought I needed to change the username database there (probably a stupid idea). Anyway, since then my site is not working. I can not login on WP adm, and the message that shows up is "Error establishing a database connection". Could anyone help me? I don not remember the previous username. Can someone explain to me as I was a small child (zero tech knowledge) exactly what to do and where to go, like, step-by-step? I've contacted my hosting company, but I do not have much time and I am not sure they will be able to help.

Please, help

 

[sw2022]

An update: I was able to find the old database username (the same that is inside the wp-config.php file) and I updated the database with the old username. But it didnt solved nothing. Any idea what I need to do?

 

[Bitpalast]

You need four things that must fit:
1) servername (normally "localhost")
2) database name
3) user name
4) password
You can either update your database user to match the entries in the wp-config.php file or you can change the entries in the wp-config.php file to match your database user settings. Either way, when these are correctly set Wordpress will work with them.

 

[sw2022]

Thank you very much Peter! All was solved! I went into the wp-config.php and found the old username. Then I updated the database with this old username and all worked well! Thank you very much!