qmk_firmware/keyboards/yatara/drink_me/keymaps/default/keymap.c

#include QMK_KEYBOARD_H

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    [0] = LAYOUT(
        LCTL(KC_Z),
        LCTL(KC_X),
        LCTL(KC_C),
        LCTL(KC_V)
    )
};