Update an example test

Author: mdmintz

examples/test_mfa_login.py

@@ -6,9 +6,7 @@ def test_mfa_login(self):
         self.open("https://seleniumbase.io/realworld/login")
         self.type("#username", "demo_user")
         self.type("#password", "secret_pass")
-        totp_code = self.get_totp_code("GAXG2MTEOR3DMMDG")
-        self.type("#totpcode", totp_code)
-        self.click("#log-in")
+        self.enter_mfa_code("#totpcode", "GAXG2MTEOR3DMMDG")
         self.highlight("img#image1")
         self.assert_text("Welcome!", "h1")
         self.save_screenshot_to_logs()