Use board as USB device

[leshow]

In the user manual for the discovery board, it claims it can be used as a USB HID device.

The STM32F303VCT6 MCU is also used to drive the second USB Mini-B connector (USB USER), which allows the board to be used as a USB Device. The STM32F3DISCOVERY can then act as a USB joystick, mouse, or other similar device. If both USBs are connected, diodes D4 and D5 protect the board and use the power from the USB ST-LINK.The board can be powered through this USB USER connector, then LED1 PWR lights, LED2 COM blinks and it can run an application in standalone mode.

Does f3 support this? I can't find anything in the cortex-m, stm32f3x or hal crates related to using the MCU's HID capabilities.