APIKey + APISecret login?

[saniales]

API keys are revokable credentials for the Twilio API. You can use API keys to authenticate to the REST API using basic auth with “user=KeySid” and “password=KeySecret”. You can also use API keys to sign access tokens which are also used by our Real-Time Communications SDKs. Access tokens are short-lived credentials that can be distributed safely to client-side applications.

Is this supported? how?