We are trying to add an action to our connector to allow a document to be added. But our API requires multipart flormdata.
This post: https://powerusers.microsoft.com/t5/Building-Flows/Custom-API-to-file-upload/td-p/19938, says that multipart data is not currently supported. Clearly, other users would like this type of functionality added. Without this change, we cannot add documents to our service using Flow.