copy data from another dataset with SPARQL

[jaanam]

Hello,

Lets say I have two datasets in my jena-fuseki-server. I need to copy 
the named graphs from dataset1 to dataset2 where I'll combine them into 
one default graph.

I got that copying work in dataset2 of my test server using the trick 
below:

insert{
  graph ?g {
    ?s ?p ?o
  }
}
where{
  service <http://<my_jena_host>:3030/<dataset1>/query> {	# original 
RDF-dataset
    {
      graph ?g { }.
    }
    graph ?g {
      ?s ?p ?o
    }
  }
};

But I also need to run the same in azure cloud where I get an error 
message of Unauthorized operation. Is there any means to configure the 
needed credentials somewhere for jena or could the same thing (copy 
dataset1 to dataset2) be done alternatively wihout need for permissions 
?

Br Jaana