I was reading netcode documantation of Connection Approval. And I was kinda happy cuse the question in my mind was answered about authentication while reading ConnectionApprovalRequest.Payload, because i thought i can send a token to the server to confirm user's session. But at the end i saw this warning. If we won't send token or password, what is payload, or how we would controll if the user is valid? I am web developer, so should i have a certification just like ssl for websites?