AWS CLI for multiple clients

alias.zsh

# in ~/.dotfiles/zsh/alias.zsh
alias aws='client=$1 source ~/.dotfiles/bin/aws.zsh $client'

aws.zsh

#!/bin/zsh
# in ~/.dotfiles/bin/aws.zsh
export EC2_REGION='eu-west-1'
case "$1" in
"cl1") 
   export AWS_ACCESS_KEY='ACC1'
   export AWS_SECRET_KEY='KEY1'
   export AWS_ACCOUNT='Client 1'
   ;;
"cl2") 
   export AWS_ACCESS_KEY='ACC2'
   export AWS_SECRET_KEY='KEY2'
   export EC2_REGION='us-west-2' # Override default region
   export AWS_ACCOUNT='Client 2'
   ;;
"cl3") 
   export AWS_ACCESS_KEY='ACC3'
   export AWS_SECRET_KEY='KEY3'
   export AWS_ACCOUNT='Client 3'
   ;;
*) 
   export AWS_ACCOUNT="No account"
   ;;
esac
echo "$AWS_ACCOUNT is active."