I tried to add user "silently" by add-user.sh script (see steps to reproduce). But unsuccessfully:
Exception in thread "main" java.lang.NullPointerException
at org.jboss.as.domain.management.security.state.PropertyFileFinder.<init>(PropertyFileFinder.java:63)
at org.jboss.as.domain.management.security.AddPropertiesUser.<init>(AddPropertiesUser.java:117)
at org.jboss.as.domain.management.security.AddPropertiesUser.<init>(AddPropertiesUser.java:121)
at org.jboss.as.domain.management.security.AddPropertiesUser.main(AddPropertiesUser.java:169)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.jboss.modules.Module.run(Module.java:260)
at org.jboss.modules.Main.main(Main.java:291)