code: def main():
      
      if len(sys.argv) != 2:
          print("Usage: {} USERNAME".format(sys.argv[0]))
          return 1
  
      authenticator = prawcore.TrustedAuthenticator(
          prawcore.Requestor("prawcore_read_only_example"),
          os.environ["PRAWCORE_CLIENT_ID"],
          os.environ["PRAWCORE_CLIENT_SECRET"],
      )
      authorizer = prawcore.ReadOnlyAuthorizer(authenticator)
      authorizer.refresh()
  
      user = sys.argv[1]
      with prawcore.session(authorizer) as session:
          data = session.request("GET", "/api/v1/user/{}/trophies".format(user))
  
      for trophy in data["data"]["trophies"]:
          description = trophy["data"]["description"]
          print(
              trophy["data"]["name"]
              + (" ({})".format(description) if description else "")
          )
  
      return 0
docs: Provide the program's entry point when directly executed.