A toilet was built downstairs in a gym, but people outside kept coming to the toilet, which stinks. What should I do?

One bad way is to collect the toilet paper provided in the toilet and put it in the gym. Some members can get the paper if they want to use it, and those who come from outside can either bring it by themselves or solve it with their fingers. Otherwise, invest more money, press an open toilet with a credit card and brush it in with a membership card. Hmm. How interesting