Creates a topic to which notifications can be published. Users can create at most 100,000 topics. For more information, see
http://aws.amazon.com/sns. This action is idempotent, so if the requester already owns a topic with the specified name, that topic's ARN is returned without creating a new topic.
/// Indicates that the user has been denied access to the requested resource.
///
/// Indicates an internal service error.
///
/// Indicates that a request parameter does not comply with the associated constraints.
///
/// Indicates that the customer already owns the maximum allowed number of topics.
///