locationReport method 
    
      
void
locationReport(
{ - required String macAddress, 
- required double proximity, 
}) 
    
    
  Implementation
  void locationReport({required String macAddress, required double proximity}) {
  startSocket(prefs.read("token"));
  socket.io.options['extraHeaders'] = {
    'authorization': 'Bearer ${prefs.read("token")}'
  };
  socket.io
    ..disconnect()
    ..connect();
  Map<String, dynamic> json = {"beacon_id": macAddress};
  if (proximity >= 0.8) socket.emit("get_in", json);
  if (proximity <= 0.2) socket.emit("get_out", json);
}