How to set up non-interactive SFTP using bash/sh script

Following is how you can non-interactively use SFTP in bash

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 #!/bin/sh


# Setup credentials
HOST='ftp.abc.com'
USER='username'
PASS='password'

lftp -u ${USER},${PASS} sftp://${HOST} <<END_OF_SFTP
cd dir
get file
bye
END_OF_SFTP
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