Can you provide a link to the location where you found this code please?
It’s quite strange, because it’s attempting to create a WiFi connection, then calling Blynk.begin(). This creates its own WiFi connection, so there is no need for the WiFi connection code.
This implies that you’ve downloaded it from the Blynk website. The link you provided is a 3rd party website. In addition, the sketch is written for Blynk a legacy not Blynk IoT
Judging by the standard of coding, I’d steer clear of that site and stick with the Blynk examples.
If you want working examples then open the IDE and go to Examples > Blynk and choose the examples from there.
Also, you’ve created three topics in the past 13 hours which all appear to be connected to the same thing that you’re trying to achieve.
Please keep your discussions in one place, and focus on trying to provide as much useful information as possible, and give full and unambiguous answers when people ask questions and provide feedback.
Did making the change I suggested solve your Invalid Auth Token issue?