How to enable skype icon in Font Awesome 5?

Question

Icons

I connected everything, a whole library of icons, and if you enter it, everything is displayed and works, but it does not work as a pseudo-element:
.ale_fa-skype::before {
content: "\f17e";
font-family: "Font Awesome 5 Free";
font-style: normal
font-variant-caps: normal;
font-variant-ligatures: normal;
font-weight: 900
text-rendering: auto;
-webkit-font-smoothing: antialiased;
line-height: 16px;
color: $light_gray;
font-size: 14px;
position: absolute;
top: 3px;
left: 0;
}

Answer 1

.ale_fa-skype::before - two colons
skype icon doesn't really work - does anyone have a solution?