USERNAME=<username>
APIKEY=<api_key>

curl -s -d \
'{
"auth":
{
"RAX-KSKEY:apiKeyCredentials":
{
"username": "$USERNAME",
"apiKey": "$APIKEY"}
}
}' \
-H 'Content-Type: application/json' \
'https://identity.api.rackspacecloud.com/v2.0/tokens' | python -m json.tool   | grep -i token -A5