src/LINEBot.php
public function createLinkToken($userId)
    {
        $url = sprintf('%s/v2/bot/user/%s/linkToken', $this->endpointBase, urlencode($userId));
        return $this->httpClient->post($url, []);
    }
public function createLinkToken($userId)
    {
        $url = sprintf('%s/v2/bot/user/%s/linkToken', $this->endpointBase, urlencode($userId));
        return $this->httpClient->post($url, []);
    }
public function createLinkToken ( $ userId ) { $ url = sprintf ( '%s/v2/bot/user/%s/linkToken' , $ this -> endpointBase , urlencode ( $ userId ) ) ; return $ this -> httpClient -> post ( $ url , [ ] ) ; }
Issues a link token used for the account link feature.

@param string $userId User ID for the LINE account to be linked.
@return Response
Issues a link token used for the account link feature .