Add user fetching script

dwmblocks-async/config.c

@@ -10,6 +10,7 @@ Block blocks[] = {
     {"sb-record",  0,    4 },
     {"sb-volume",  1,    5 },
     {"sb-date",    1,    6 },
+    {"sb-user",    0,    7 },
 };
 
 const unsigned short blockCount = LEN(blocks);

scripts/dwmblocks/sb-user

@@ -0,0 +1,5 @@
+#!/bin/sh
+# Displays the current user
+
+. sb-theme
+display " $(whoami)"