I have some sites on a server and I want to only backup their webroots creating a new repository for each site. With bash 4 I can use a dictionary.

```
declare -A sites=(["site1"]="/var/www/webroot1"
                  ["site2"]="/var/www/webroot2"
                  ["site3"]="/var/www/webroot3"
                  )

```

The borg command is: 

```
borg create  --verbose  --progress --list --stats  --show-rc  --compression lz4 $REPOSITORY::{$key}-{now:%Y-%m-%d} $value

```

How can I create a for loop that will use both key and value in this command?
Something like the following but instead doing `echo`, use the keys and values in the command and backup all sites one by one.

```
for i in "${!projects[@]}";
do
  echo "key  : $i"
  echo "value: ${sites[$i]}"
done

```

I **don't** want to just echo the key and value. I want to use them in **one command**.