Typo

src/freedombone-utils-validation

@@ -62,7 +62,7 @@ function validate_freedns_code {
 
 function is_valid_user {
     USRNAME="$1"
-    if [[ "$USRNAME" != "turtl" && "$USRNAME" != "znc" && "$USRNAME" != "pihole" && "$USRNAME" != "fbone" && "$USRNAME" != "go" && "$USRNAME" != "gogs" && "$USRNAME" != "git" && "$USRNAME" != "mirrors" && "$USRNAME" != "sync" && "$USERNAME" != "tahoelafs" ]]; then
+    if [[ "$USRNAME" != "turtl" && "$USRNAME" != "znc" && "$USRNAME" != "pihole" && "$USRNAME" != "fbone" && "$USRNAME" != "go" && "$USRNAME" != "gogs" && "$USRNAME" != "git" && "$USRNAME" != "mirrors" && "$USRNAME" != "sync" && "$USRNAME" != "tahoelafs" ]]; then
         echo "1"
     else
         echo "0"