add simple tokenmaker example

examples/tokenmaker.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+if __name__ == "__main__":
+	import json
+	import asyncio
+	
+	from getpass import getpass
+	
+	from aiocraft.mc.auth.mojang import MojangAuthenticator
+
+	username = input("username > ")
+	password = getpass("password > ")
+
+	async def main(usr, pwd):
+		tok = MojangAuthenticator(username=usr, password=pwd)
+		await tok.login()
+		return tok
+
+	t = asyncio.run(main(username, password))
+
+	print(json.dumps(t.serialize()))