Add users filtering

base/utils.go

@@ -10,3 +10,13 @@ func Panic(err error) {
 		log.Fatalf("%s\n", err)
 	}
 }
+
+// InSlice detects value presence in a string slice
+func InSlice(value string, slice []string) bool {
+	for _, val := range slice {
+		if value == val {
+			return true
+		}
+	}
+	return false
+}