Look how PushData works at https://github.com/blynkkk/blynk-library/blob/master/examples/GettingStarted/PushData/PushData.ino (it is also in the examples of your IDE against Blynk).
These 3 lines in the PushData sketch are only required if you are using Ethernet to connect to Blynk:
#include <SPI.h>
#include <Ethernet.h>
#include <BlynkSimpleEthernet.h>
A few examples for an ESP connection can be found at Blynk for Beginners and help with your project