usage

cmd/root.go

@@ -19,6 +19,13 @@ func readDb() (*mps.TransactionLog, error) {
 }
 
 func Root(args []string) error {
+	if len(args) == 0 {
+		return fmt.Errorf(`
+Missing Command. Supported options:
+balance
+users
+    `)
+	}
 	switch args[0] {
 	case "users":
 		return users(args[1:])