Backup script for backblaze b2

backblaze b2 backup script

#!/usr/bin/env bash
#
# Backup selected directories to a Backblaze B2 bucket
#
# Example daily cron:
# @daily /usr/local/bin/b2backup >/dev/null
#

# Account creds
id=xxxxxxxxxx
key=xxxxxxxxxxxxxxxx

# Threads
threads=5

# Directories to backup, and the name of their subdirectory in the bucket
declare -A dir
dir=(["/var/backups"]="backups" ["/var/www"]="www")

# Bucket name 
bucket=linode

for i in "${!dir[@]}" do;
    /usr/local/bin/b2sync -rxt$threads $id $key "$i" $bucket:"${dir["$i"]}"
done

Is this still compatible with the latest version of the b2 cli tool?