Analog pin A0 to Virtual pin NodeMcu LolinV3 - Blynk

Hello, iam new there.
How can i make an Analog pin A0 from nodeMcu as a virtual pin (ex.V1) in Blink.
I want read analog data from moisture sensor an use it data in eventor ( if humidity is low . Turn ON D2 (relay)with water pump) thank you

BLYNK_READ(V5) //Blynk app has something on V5
sensorData = analogRead(A0); //reading the sensor on A0
Blynk.virtualWrite(V5, sensorData); //sending to Blynk