Server

Hello. While I was browsing on discord yesterday, I suddenly came across a phone number verification. I wrote my phone number as requested and entered the incoming code and verified my phone number. But after I verified my number, I realized that it had left several servers without my knowledge. I didn't get a ban or kick from these servers, it had happened before. And now I can't re-enter the servers it left without my knowledge. What should I do? How can I re-enter those servers?