This library is built for a NodeMCU board (but could be easily adapted to other arduino boards) and allows you to use one or two MRFC522 RFID sensors as momentary switches.
See https://github.com/miguelbalboa/rfid for pinouts if using other arduino boards.
D0 - Programming pin, momentary switch, pull down resistor
D1 - Status pin 1 (HIGH out if there's an RFID tag on the 1st sensor, LOW otherwise)
D2 - Status pin 2 (HIGH out if there's an RFID tag on the 2nd sensor, LOW otherwise)
D3 - SDA Pin 1st sensor
D4 - RST PIN - both sensors shared
D5 - SCK PIN - both sensors shared
D6 - MISO PIN - both sensors shared
D7 - MOSI PIN - both sensors shared
D8 - SDA Pin 2nd sensor
D0 - Press once to start programming, put RFID on eithe RFID reader. This reader is now configured to only activate on that tag. D0 - Press twice to reset all RFIDs and allow any RFID to work