I am currently creating a workflow that requires the user assigned with the task to upload an attachment. 

Then I would like this attachment to be attached to an email that will be sent out to another team. However, this attachment is current residing on the Workflow Task list item rather than the list item.

I have been searching for answers but found that I am required to use Call HTTP Web Service and Web Request to achieve this, however I am not to sure on how to go about using it.