tomcat 9 default username and password
<?xml version='1.0' encoding='utf-8'?>
<tomcat-users xmlns="http://tomcat.apache.org/xml"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://tomcat.apache.org/xml
tomcat-users.xsd"
version="1.0">
<role rolename="manager-gui" />
<user username="admin" password="admin" roles="manager-gui" />
</tomcat-users>