Get data from Azure devops sprints and create Burn up chart

Hi ,

I'm tryig to pull my current sprint data from Azure Devops(Initially VSTS)  .I'm able to fetch data into PBI Desktop, However data is coming as individual tables (like Work items , Tasks, Bugs and User Stories),  pulled data from Capacities (or capacity) table too using APIs. But not able to findout any relationships between tables (work item and capacity) so that i can show WORKITEMSagainst available CAPACITES at a given point of date.

Any help would be highly appriciated.