@<1562610699555835904:profile|VirtuousHedgehong97>

source_url="s3:...", 

This means your data is already on S3 bucket, it will not "upload" it it will just register it.
If you want to upload files, then they should be local and then when you call upload you can specify the target S3 bucket, and the data will be stored in a unique folder in the bucket
Does that make sense ?