Report server instance name

lib/api.dart

@@ -72,8 +72,11 @@ class InvenTreeAPI {
   // Authentication token (initially empty, must be requested)
   String _token = "";
 
+  // Server instance information
+  String instance = '';
+
   // Server version information
-  String _version;
+  String _version = '';
 
   // Getter for server version information
   String get version => _version;
@@ -174,6 +177,9 @@ class InvenTreeAPI {
 
     _version = data["version"];
 
+    // Record the instance name of the server
+    instance = data['instance'] ?? '';
+
     // Request token from the server if we do not already have one
     if (_token.isNotEmpty) {
       print("Already have token - $_token");

lib/settings.dart

@@ -61,6 +61,10 @@ class _InvenTreeSettingsState extends State<InvenTreeSettingsWidget> {
                 title: Text("Server Version"),
                 subtitle: Text(InvenTreeAPI().version.isNotEmpty ? InvenTreeAPI().version : "Not connected"),
               ),
+              ListTile(
+                title: Text("Server Instance"),
+                subtitle: Text(InvenTreeAPI().instance.isNotEmpty ? InvenTreeAPI().instance : "Not connected"),
+              ),
               Divider(),
               ListTile(
                 title: Text("App Name"),