sonatype/nexus — comment on commit 89e13bcea046bc27c3b94215b8d5a36e4dffea7b
File: nexus-maven-plugins/nexus-maven-plugin/src/main/java/org/sonatype/nexus/plugin/AbstractStagingMojo.java line 321
By bentmann:

Per-repository credentials for mvn3 need to be provided by getAuthentication(), which is new to mvn3...