Returns a URL linking to an avatar. The avatar image must exist as a file at the provided avatarBaseUrl location
and consist of a number (no leading zeros) ending with .png. For example, if there are 500 avatar images, the
first one will be 0.png and the last one will be 499.png.
Returns a URL linking to an avatar. The avatar image must exist as a file at the provided avatarBaseUrl location and consist of a number (no leading zeros) ending with .png. For example, if there are 500 avatar images, the first one will be 0.png and the last one will be 499.png.