HTTPPreemptive Auth forces non-null user name

 
{{: java.lang.RuntimeException: Unable to translate HPCC record defintion to Spark schema:Could not fetch 'benchmark::integer::20kb' info from WsDFU ESP due to wsdfuclient init error: WS Client Stub not available.
Username may not be null
   at org.hpccsystems.spark.datasource.HpccRelation.schema(HpccRelation.java:77)
   at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:440)
   at org.apache.spark.sql.DataFrameReader.loadV1Source(DataFrameReader.scala:228)
   at org.apache.spark.sql.DataFrameReader.$anonfun$load$2(DataFrameReader.scala:210)
   at scala.Option.getOrElse(Option.scala:189)
   at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:210)
   at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:185)
   at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.base/java.lang.reflect.Method.invoke(Method.java:566)
   at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
   at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
   at py4j.Gateway.invoke(Gateway.java:282)
   at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
   at py4j.commands.CallCommand.execute(CallCommand.java:79)
   at py4j.ClientServerConnection.waitForCommands(ClientServerConnection.java:182)
   at py4j.ClientServerConnection.run(ClientServerConnection.java:106)
   at java.base/java.lang.Thread.run(Thread.java:829)}}