convert player to ts

src/DarkWeb/DarkWeb.tsx

@@ -14,7 +14,8 @@ export function checkIfConnectedToDarkweb(): void {
     if (!isValidIPAddress(darkwebIp)) {
       return;
     }
-    if (darkwebIp == Player.getCurrentServer().ip) {
+    const server = Player.getCurrentServer();
+    if (server !== null && darkwebIp == server.ip) {
       Terminal.print(
         "You are now connected to the dark web. From the dark web you can purchase illegal items. " +
           "Use the 'buy -l' command to display a list of all the items you can buy. Use 'buy [item-name] " +