Personal access tokens don't work with usernames with capital letter about packeton HOT 1 CLOSED

public function setUsername($username)
    {
        $this->username = $username;
        $this->usernameCanonical = mb_strtolower($username);

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function setUsernameCanonical($usernameCanonical)
    {
        $this->usernameCanonical = $usernameCanonical;

        return $this;
    }