Note that you have to install IDS 11.70.XC2 to use this feature, I faced a bug in 11.70.UC1 on Linux:
CREATE USER statement failed with syntax error...
Fixed in 11.70.UC2...
Seb
By reading the documentation section about CREATE USER (mapped and internally authenticated users), it appears that this feature was introduced in the 11.70.xC2 release and was not in 11.70.xC1 ... So it's not a bug, CREATE USER was not existing in 11.70.xC1.
The fact that CREATE TRUSTED CONTEXT is supported in 11.70.xC1 confused me... :-(
Seb