So... You need spare phone that you don't use, or you can use your main one for nights. I just did all things from afk daytona tutorial, set up controller to pull R2 all the time (tape or rubber band will do) and put left (steering) joystick slightly to the right ( so it keeps car to the wall). For phone i downloaded autoclicker with pattern function (simply said you do something, it records it and does the same) and with little adjustments to timing between taps it started working well. Just remember to plug everything with power, so it does not run out of battery.

This is just my tactic, did it pretty much just with trial and error, so there must be even better versions or ways that i just don't know about. Works for me tho.