Golang HTTP使用tusd仅将元数据上传到S3

I am using the tusd library to upload a file directly to S3 in Go. It seems to be functioning however tusd uploads two files a .info metadata file and a .bin actual content file. For some reason my code is only uploading the info file. The documentation is quite tricky to navigate so perhaps I have missed a setting somewhere

Code as gist to show both the server and the client code.