MySql server "Error No. 2003 Can not connect to Mysql server", I can not connect, I have already changed my.cnf and created remote users help please

I need help guys, my server is running on the Google Cloud platform, I'm going to leave the specs here:

mysql version: See 15.1 Distrib 10.1.26-MariaDB, for debian-linux-gnu (x86_64) using readline 5.2

The MySql configuration file is located at "/etc/mysql/mariadb.conf.d/50-server.cnf"

I have already changed the line from "bind-address = 127.0.0.1" to "bind-address = 0.0.0.0" after that I restarted the service with "sudo mysql service restart"

Then I created users and allowed remote connections, here is a list of my users

I tried to connect through the sqlyog client, but it still throws the same error message

someone please help):