Add an auth example

examples/Authentication/Authenticate.ino

@@ -0,0 +1,24 @@
+const char* host     = "ESP-OTA"; // Used for MDNS resolution
+const char* ssid     = "ssid";
+const char* password = "password";
+
+#include <WebOTA.h>
+
+// the setup function runs once when you press reset or power the board
+void setup() {
+	Serial.begin(115200);
+
+	init_wifi(ssid, password, host);
+
+	// If you call useAuth() in your setup function WebOTA will use
+	// HTTP digest authentication to request credentials from the user
+	// before allowing uploads
+	webota.useAuth("username", "password");
+}
+
+// the loop function runs over and over again forever
+void loop() {
+	// Do other stuff
+
+	webota.handle();
+}