Password Library and Creating a Variable Integer

http://tmrh20.github.io/RF24/classRF24.html#a8e2eacacfba96426c192066f04054c5b.

Looking at this website, I'm not sure what to actually change in my code.

I saw this

void RF24::read( void* buf, uint8_t len ){ 
  // Fetch the payload
   read_payload( buf, len );
  //Clear the two possible interrupt flags with one command  
write_register(NRF_STATUS,_BV(RX_DR) | _BV(MAX_RT) | _BV(TX_DS) );
 }

But I don't know how to fix the variable done. The example code also used the variable data, but I don't know where to include it or what it means.

if(radio.available()){
  radio.read(&data,sizeof(data));
}