NewSigner builds a new SAS signer for use in generation Service Bus and Event Hub SAS tokens.

NewTokenProvider builds a SAS claims-based security token provider.

TokenProviderWithEnvironmentVars creates a new SAS TokenProvider from environment variables There are two sets of environment variables which can produce a SAS TokenProvider 1) Expected Environment Variables: - "EVENTHUB_KEY_NAME" the name of the Event Hub key - "EVENTHUB_KEY_VALUE" the secret for the Event Hub key named in "EVENTHUB_KEY_NAME" 2) Expected Environment Variable: - "EVENTHUB_CONNECTION_STRING" connection string from the Azure portal looks like: Endpoint=sb://namespace.servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=superSecret1234=.

TokenProviderWithKey configures a SAS TokenProvider to use the given key name and key (secret) for signing.