Interface for providing CDP credentials. Implementations are free to use
any strategy for providing CDP credentials, such as simply providing
static credentials that don't change, or more complicated implementations,
such as integrating with existing key management systems.
Returns CdpCredentials which the caller can use to authenticate a CDP
request. Each implementation of CdpCredentialsProvider can chose its own
strategy for loading credentials. For example, an implementation might
load credentials from an existing key management system, or load new
credentials when credentials are rotated.
CdpCredentials which the caller can use to authenticate an CDP