Released 2x how to add this icon in username banner ? [help needed]

[ShieldX]

I try to copy this :

https://imgur.com/M1Ealyi

i able to copy and my result is like this but missing that diamond icon how to add/ what will be the code ?

https://imgur.com/u8Pdksx

 

[BattleKing]

try to use

.sparkle::before{
    font-family: "Font Awesome 5 Pro";
    padding-right: 5px;
    content:"\f3a5";
}