How give aws credential to jenkins pipeline

I ended up going the REST API route, using jq to parse incoming JSON

First get the page id:

pageID=$(curl -u $Confluence_UserID:$Confluence_Password -X GET \
    "https://redacted.atlassian.net/wiki/rest/api/content?title=$PageTitle&spaceKey=$Space" \
    | jq -r .results[].id \
    )

Then get the version (version number must be provided and incremented or the update call fails!)

pageVersion=$(curl -u $Confluence_UserID:$Confluence_Password \
    "https://redacted.atlassian.net/wiki/rest/api/content/$pageID?expand=version" \
    | jq .version.number \
    )
((pageVersion++))

Earlier in the jenkins job, it generated the HTML for the confluence page into a file in the workspace. Load that for use below

htmlOutput=$(<myHTMLSnippet.txt)

And the final part, sending the page update

curl -u $Confluence_UserID:$Confluence_Password \
    -X PUT -H 'Content-Type: application/json' \
    https://redacted.atlassian.net/wiki/rest/api/content/$pageID \
    --data @- <<END;
{
    "id": "$pageID",
    "type": "page",
    "title": "$PageTitle",
    "space": {
        "key": "$Space"
    },
    "body": {
        "storage": {
            "value": "$htmlOutput",
            "representation": "storage"
        }
    },
    "version": {
        "number": $pageVersion,
        "minorEdit": true
    }
}
END

There are lots of ways to do this. Here are two ways I can think of off the top of my head:

steps {
  println(WORKSPACE)
}

or

steps {
  def foo = sh(script: 'pwd', returnStdout: true)
  println(foo)
}