Describe the bug

There is only one button on the Nucleo L432KC, yetUSER_BTN is defined in thevariant file.

Based on my tinkering, I would say theUSER_BTN is "pressed" by triggering the accelerometer. While I can see this as a handy feature, I think it is very misleading to call itUSER_BTN, instead ofACCEL_PIN (or something of that nature).

To Reproduce

Complete source code which can be used to reproduce the issue. Please try to be as generic as possible (no extra code, extra hardware,...)

#define BUTTON USER_BTN // no user button available (triggered by accelerometer event)// #define BUTTON 3 // behaves as expected with external momentary push buttonvolatile bool isr_fired = false;void buttonISR () {    isr_fired = true;}void setup () {    ::pinMode(LED_BUILTIN, OUTPUT);    ::pinMode(BUTTON, INPUT);    ::attachInterrupt(digitalPinToInterrupt(BUTTON), buttonISR, FALLING);}void loop () {    if (isr_fired) {        isr_fired = false;        ::digitalWrite(LED_BUILTIN, HIGH);        ::delay(250);    }    ::digitalWrite(LED_BUILTIN, LOW);}

Steps to reproduce the behavior:

1. Plug
2. Press USER_BTN (i.e. move or tap board)
3. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots

From theProduct Overview Page:

Desktop (please complete the following information):

• OS: Linux
• Arduino IDE version: 1.8.19
• STM32 core version: 2.2.0
• Tools menu settings if not the default: defaults
• Upload method: Mass Storage

Board (please complete the following information):

• Name: Nucleo L432KC
• Hardware Revision: ?
• Extra hardware used if any: N/A

Additional context
Add any other context about the problem here.