Lambda function to transfer from AWS S3 to external SFTP

I am relatively new to Lambda and I am trying to create a function that when a new file is uploaded to an S3 bucket it will trigger the Lambda function and push the new file to an external SFTP server. I set up the blueprint “Get-S3” function which ran when I uploaded a file to my bucket but I’m having an issue with the coding to push to the SFTP. Can anyone lend some assistance?

Thank you