On the right side of the entrance door there is the keypad which is used to unlock and lock the entrance door (to always be used, even later to close or open the door).
Enter the access code received and then press the “V” button (bottom right of the keyboard).
After entering the code, a confirmation “beep” will be played and you will hear a noise similar to that of a key turning, wait for the noise to stop and then open the door with the handle.