Explanation for developers added

adding sample code to save developers from looking up how argparse module works.

run_smoke_test.py

@@ -4,6 +4,9 @@
 
 from notion.smoke_test import run_live_smoke_test
 
+# Following code is a sample. Input the code onto the terminal, with your own notion page URL and token_v2
+# python3 run_smoke_test.py --page https://www.notion.so/fitcuration/Myam-Myam-Love-a0d22196f58f4efb8a38bcf9b3e06459 --token e26b797ce5beaf4170f2699fdab0b6be375175fa6ca66c9d1a06ca08bc70d578ae2203f408bbbc38554c20357876387a9942152d868ac7c98240be964fd88496257bf0fbe8372de88db5a41c106a
+
 if __name__ == "__main__":
     description = "Run notion-py client smoke tests"
     parser = argparse.ArgumentParser(description=description)
@@ -15,6 +18,7 @@
 
     token = args.token
     if not token:
+        # if you don't want your terminal to be filled with messy token, then input your token_v2 at "NOTION_TOKEN"
         token = os.environ.get("NOTION_TOKEN")
     if not token:
         print(