Retrieves information about a fleet's instances, including instance IDs. Use this action to get details on all instances in the fleet or get details on one specific instance.
To get a specific instance, specify fleet ID and instance ID. To get all instances in a fleet, specify a fleet ID only. Use the pagination parameters to retrieve results as a set of sequential pages. If successful, an Instance object is returned for each result.
/// The service encountered an unrecoverable internal failure while processing the request.
/// Clients can retry such requests immediately or after a waiting period.
///
/// One or more parameter values in the request are invalid. Correct the invalid parameter
/// values before retrying.
///
/// A service resource associated with the request could not be found. Clients should
/// not retry such requests.
///
/// The client failed authentication. Clients should not retry such requests.
///
