Why does XAMPP MySQL and NodeJS npm install mysql show different Databases?

Question

MySQL

In short, I wrote a lot of text and accidentally refreshed the page

spoiler

(я пальцожоп)

So short.
XAMPP MySQL and NodeJS npm install mysql show different Databases.
node js console

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 5.7.28-0ubuntu0.16.04.2 (Ubuntu)

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mysql> SHOW DATABASES;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| MyDB123            |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0,25 sec)

mysql>

xampp mysql

localhost/		http://localhost/phpmyadmin/server_sql.php
SQL-запрос успешно выполнен.

SHOW DATABASES

db	
information_schema	
mysql	
performance_schema	
phpmyadmin

Answer 1

What users are used in both cases?