AWS CLI set to role with MFA

aws_set_role_mfa.bash

#!/bin/bash

role_arn="<your_role_arn>"
mfa_arn="<your_mfa_arn>"
session_id=`date +%s000`
# export AWS_DEFAULT_REGION="us-east-2"
echo "MFA:"

read token_code
cmd=$(aws sts assume-role --role-arn "${role_arn}" --role-session-name "${session_id}"  --serial-number "${mfa_arn}" --token-code "${token_code}" --query '[Credentials.AccessKeyId,Credentials.SecretAccessKey,Credentials.SessionToken]' --output text)
arr=(`echo ${cmd}`)

unset AWS_SECURITY_TOKEN
export AWS_ACCESS_KEY_ID=${arr[1]}
export AWS_SECRET_ACCESS_KEY=${arr[2]}
export AWS_SESSION_TOKEN=${arr[3]}
export AWS_SECURITY_TOKEN=${arr[3]}