Added China API region support

Meraki.Api/Data/ApiRegion.cs

@@ -0,0 +1,15 @@
+namespace Meraki.Api.Data;
+public enum ApiRegion
+{
+	/// <summary>
+	/// The default region for the Meraki Dashboard API
+	/// This uses the "api.meraki.com" endpoint
+	/// </summary>
+	Default,
+
+	/// <summary>
+	/// The China region for the Meraki Dashboard API
+	/// This uses the "api.meraki.cn" endpoint
+	/// </summary>
+	China
+}

Meraki.Api/MerakiClient.cs

@@ -22,8 +22,6 @@ public partial class MerakiClient : IDisposable
 	/// <summary>
 	/// A Meraki portal client
 	/// </summary>
-	/// <param name="options"></param>
-	/// <param name="logger"></param>
 	public MerakiClient(MerakiClientOptions options, ILogger? logger = default)
 	{
 		var apiClientVersion = new System.Version(ThisAssembly.AssemblyFileVersion);
@@ -34,7 +32,14 @@ public MerakiClient(MerakiClientOptions options, ILogger? logger = default)
 		_httpClientHandler = new AuthenticatedBackingOffHttpClientHandler(options ?? throw new ArgumentNullException(nameof(options)), this, _logger);
 		_httpClient = new HttpClient(_httpClientHandler)
 		{
-			BaseAddress = new Uri($"https://{options.ApiNode ?? "api"}.meraki.com/api/v1"),
+			BaseAddress = new Uri(
+				options.ApiRegion switch
+				{
+					ApiRegion.Default => $"https://{options.ApiNode ?? "api"}.meraki.com/api/v1",
+					ApiRegion.China => $"https://{options.ApiNode ?? "api"}.meraki.cn/api/v1",
+					_ => throw new ArgumentOutOfRangeException($"Unsupported API Region {options.ApiRegion}")
+				}
+			),
 			Timeout = TimeSpan.FromSeconds(options.HttpClientTimeoutSeconds)
 		};
 		_refitSettings = new RefitSettings

Meraki.Api/MerakiClientOptions.cs

@@ -5,6 +5,13 @@
 /// </summary>
 public class MerakiClientOptions
 {
+	/// <summary>
+	/// The API Region.
+	/// Defaults to "World", which is the default region for the Meraki Dashboard API.
+	/// Only change this if you are using the China API endpoint.
+	/// </summary>
+	public ApiRegion ApiRegion { get; set; } = ApiRegion.Default;
+
 	/// <summary>
 	/// The API Node (e.g. "n72").
 	/// This is optional, but highly recommended as directly addressing the correct instance will reduce propagation delays.