Backup to an S3 Bucket

#!/bin/bash
BUCKET=bucketname
MYSQL_USER=username 
MYSQL_PASSWORD=password 
MYSQL_HOST=localhost
echo 'Started'
date +'%a %b %e %H:%M:%S %Z %Y'
mysqldump -u $MYSQL_USER -p$MYSQL_PASSWORD --single-transaction --routines --triggers --all-databases | gzip > backup.gz 
S3_KEY=$BUCKET/database/$(date "+%Y-%m-%d")-backup.gz
/root/.local/bin/aws s3 cp backup.gz s3://$S3_KEY 
rm -f backup.gz 

date +'%a %b %e %H:%M:%S %Z %Y' 
echo 'Finished'