GET - /avatar/{username}.{format}
GET - /avatar/{userId}.{format}
Returns - a 50x50 image for the specified user of the specified format. Possible formats: jpg|png|gif.
GET - /avatar/WxH/{username}.{format}
GET - /avatar/WxH/{userId}.{format}
Returns - just as above, but with the specified dimensions.
Example
<img src="/avatar/sandropadin.jpg">