feat: finish add and remove author bindings and tui elements

src_code/go_src/cmd/utils/user_util.go

@@ -67,3 +67,7 @@ func Define_users(author_file string)  {
 		os.Exit(2)
 	}
 }
+
+func RemoveUser(short string) {
+	delete(Users, short)
+}