fixed issue when user where already exist

lib/aaa_errors.sh

@@ -86,10 +86,19 @@ function backtrace
 # Execute command outside of error control, echoes ouput error code
 noerror()
 {
+    if [[ $1 == "--noout" ]]; then
+        local noout=true
+        shift
+    fi
+    
     set +o errexit
     trap - ERR
 
-    $@
+    if [[ -n $noout ]]; then
+        $@ > /dev/null 2>&1
+    else
+        $@
+    fi
     local code=$?
 
     trap "error ${LINENO}" ERR