Enabling and Resetting User Tokens

Hi, I downloaded Nexus OSS, I did a 1st run on a Centos 8 box and is working fine. Mainly, I will test integration between Azure Devops server and Nexus for CI/CD build pipelines. I started reading the book at
and reached the part where it is indicated
Security Setup with User Tokens > Enabling and Resetting User Tokens, but when I browse my Nexus, I dont find this topic.
Thanks for your help

User tokens are a paid feature of Nexus Repository Manager Pro. (See the info box at the top of that page stating “Available in Nexus Repository Pro only”.) Further information about Nexus Repository Pro is at Nexus Repository Manager - Binary & Artifact Management | Sonatype.