My keyboard isn’t working and I can’t log into my laptop
Plug in any USB keyboard to the USB port. 


Newest MacBook Air use USB-C connectors (ThunderBolt 3)
The rest use USB-A


Both work with any PC keyboard or Mac keyboard or whatever usb keyboard you might have around. 

Hopefully the liquid damage didn’t break the USB controller or the system board. Your keyboard might be fine and the problem is no keyboard would work. If you reset your SMC once and external keyboard do not work, send your Mac in for data transfer or repair. 

Here is a masterpiece on keyboards written by one of our resident experts. 


Keyboard key stuck or not being recognized; how to fix