You can't use wifi in Blynk.confg() as the function is defined as:
void config(const char* auth,
uint16_t port = BLYNK_DEFAULT_PORT)
So just Blynk token, IP address and port number. For your variable names, and before I upgrade to the v0.4.1, the following compiles and the ESP connects.
Blynk.config(auth, myBlynkServer, 8442);