Incorrect username display for users with no Discord avatar

  1. Bug description
    If a player doesn’t have a Discord avatar, their name will be replaced by “Username” during the duel

  2. Bug reproduction steps
    Duel vs a player without a Discord avatar

  3. Screenshot OR error code
    https://imgur.com/a/vqztFy3 (actual username was omerp109)

  4. Expected behavior
    Even if the player doesn’t have a Discord avatar and the dummy image is displayed, their username should be displayed correctly.