Traceback (most recent call last):
File "NFC_Security.py", line 53, in <module>

LEDs.authorised()
File "/home/pi/Garage_Parking/rpi_components/LEDs.py", line 13, in
authorised

greenLed = LED(6)  # Green LED lights up when the user is authorised
File "/usr/lib/python2.7/dist-packages/gpiozero/devices.py", line 134, in
__call__
self = super(GPIOMeta, cls).__call__(*args, **kwargs)

File "/usr/lib/python2.7/dist-packages/gpiozero/output_devices.py", line
131, in __init__ super(DigitalOutputDevice, self).__init__(pin, active_high, initial_value)

File "/usr/lib/python2.7/dist-packages/gpiozero/output_devices.py", line 41, in __init__
super(OutputDevice, self).__init__(pin)

File "/usr/lib/python2.7/dist-packages/gpiozero/mixins.py", line 69, in __init__
super(SourceMixin, self).__init__(*args, **kwargs)

File "/usr/lib/python2.7/dist-packages/gpiozero/devices.py", line 381, in __init__
pin = pin_factory(pin)

File "/usr/lib/python2.7/dist-packages/gpiozero/pins/rpigpio.py", line 82, in __new__
GPIO.setmode(GPIO.BCM)

ValueError: A different mode has already been set!
Exception AttributeError: "'LED' object has no attribute '_controller'" in <bound method LED.__del__ of <gpiozero.LED object closed>> ignored