Assume a role with MFA in bash and export session to environmental variables

assume_role.sh

PROFILE=test

echo "Please, provide MFA code:"
read MFA_CODE

ASSUMED_ROLE=$(aws sts assume-role --role-arn="$(aws configure get role_arn --profile $PROFILE)" --role-session-name=session --token-code=$MFA_CODE --serial-number="$(aws configure get mfa_serial --profile $PROFILE)" --output text)

ASSUMED_ROLE_ARRAY=( $ASSUMED_ROLE )
if [ -z "$ASSUMED_ROLE_ARRAY" ]
then
      echo "Error while getting token"
      exit 1
fi

export AWS_ACCESS_KEY_ID=${ASSUMED_ROLE_ARRAY[4]}
export AWS_SECRET_ACCESS_KEY=${ASSUMED_ROLE_ARRAY[6]}
export AWS_SESSION_TOKEN=${ASSUMED_ROLE_ARRAY[7]}