Creates a new secret.
function CreateSecret(SecretName: String; Description: String): String;
This method creates a new secret with the given SecretName. The secret data is taken from the input stream supplied via the SetInputStream method, the specified LocalFile, or the SecretData or SecretString property; it may be up to 65536 bytes in length. The Id of the initial secret version is returned.
The value passed for SecretName may be up to 512 characters long, and must consist solely of ASCII letters, digits, and the following characters: /_+=.@-.
The Description parameter is optional; it can be any string up to 2048 characters long.
If desired, the KMSKeyId configuration setting can be set before calling this method to specify the Amazon KMS CMK (customer master key) to use to encrypt the secret (by default, an AWS-managed one is used).