Error: Cannot convert 'char[33]' to Stream&'

[auil]

I'm new to the Arduino community and I tried out this code I saw on youtube. Running code got me this error, any help?

[UKHeliBob]

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[johnwasser]

It looks to me like Blynk.begin() is expecting '&Serial' in the place where you have 'auth'. Look at the Blynk library examples (File -> Examples -> Blynk) to see how to use the library.