How do I set Tomcat Manager Application User Name and Password for NetBeans?

When you’re launching tomcat server from netbeans IDE you need to check in menu “tools->servers” on connection tab for tomcat server – there is catalina base directory. And you need to include something like:

 <role rolename="manager"/>
  <user username="admin" password="admin" roles="manager"/>

at file

\CATALINA_BASE\conf\tomcat-users.xml

or use username automatically generated by IDE with description already placed in this file or on connection tab

For Manager Apps : GUI access:

<role rolename="manager-gui"/>
<user username="tomcat" password="s3cret" roles="manager-gui"/>