In the runtime application, gets the value set for the current user of an extension property defined for the User context. Such a property is defined in USoft Definer. Its value is set in USoft Authorizer.
NOTE: This retrieves property values set at the time when the runtime application was started.
Returns the value if it is available. Otherwise, returns the NULL value.
The required property-name is a string that is the name of the extension property.