Function generate_connect_token 

pub fn generate_connect_token(
    public_server_addresses: &[SocketAddr],
    internal_server_addresses: &[SocketAddr],
    expire_seconds: i32,
    timeout_seconds: i32,
    client_id: u64,
    protocol_id: u64,
    private_key: &Key,
    user_data: &UserData,
) -> Result<[u8; 2048], Error>

Generates a connect token.

This is what the web backend calls to authorize a client. The returned buffer is passed to the client over a secure channel (e.g. HTTPS), and the client passes it to Client::connect.

public_server_addresses are the addresses the client connects to. The matching entries in internal_server_addresses go inside the encrypted private token and are what each server checks its own address against; they may differ from the public addresses when servers sit behind NAT or a load balancer. Both slices must have the same length, in the range [1, MAX_SERVERS_PER_CONNECT].

The token expires expire_seconds after creation; negative means never expires (dev only). timeout_seconds is how long a connection can go without receiving packets before it is dropped; negative disables timeouts (dev only).