public function increment()
    {
        $this->counter++;
        if (1 === $this->counter) {
            $this->expiresAt = $this->now() + $this->expiresIn;
        }
    }
public function increment()
    {
        $this->counter++;
        if (1 === $this->counter) {
            $this->expiresAt = $this->now() + $this->expiresIn;
        }
    }
Increment counter.