How to authenticate in REST with Jmix User credentials?

[veprinsky (Vitaly Veprinsky)]

a day later the repository is available:

> Task :bootBuildInfo
Download https://nexus.jmix.io/repository/public/io/jmix/datatools/jmix-datatools-flowui-starter/2.3.999-SNAPSHOT/maven-metadata.xml, took 27 ms