Hume AI

Hey guys for Hume AI Expression-Measurement, My app front end requries me to upload the urls via api, however since the node has a call back, when uplaoding the yalm its empty. Due to i assuem it not having a result. Is there anyway around this? I tried taking out the callback url, and putting everything in one flow but when i do that, it doesnt wait for the job to be done causing invalid data to be passed through