Creates a new secret.
The value passed for SecretName must consist solely of alphanumeric characters, hyphens (-), and underscores (_); and may be up to 255 characters in length.
If there are any items in the Label* properties, they will be applied to the newly-created secret. Secrets may have up to 64 labels.
Note that this method makes two requests: the first one creates the empty secret itself (which is just a container for secret versions), and the second one creates an initial secret version with the actual secret data (as if CreateVersion had been called). The Id of the initial secret version is always 1.