fkooman\OAuth\Client\TokenRequest::withRefreshToken PHP Méthode

    public function withRefreshToken($refreshToken)
    {
        $p = array('refresh_token' => $refreshToken, 'grant_type' => 'refresh_token');
        // Some services require specifying the redirect_uri also when using
        // the refresh_token.
        // issue: https://github.com/fkooman/php-oauth-client/issues/20
        if ($this->clientConfig->getUseRedirectUriOnRefreshTokenRequest()) {
            if (null !== $this->clientConfig->getRedirectUri()) {
                $p['redirect_uri'] = $this->clientConfig->getRedirectUri();
            }
        }
        return $this->accessTokenRequest($p);
    }

 public function getAccessToken(Context $context)
 {
     // do we have a valid access token?
     $accessToken = $this->tokenStorage->getAccessToken($this->clientConfigId, $context);
     if (false !== $accessToken) {
         if (null === $accessToken->getExpiresIn()) {
             // no expiry set, assume always valid
             return $accessToken;
         }
         // check if expired
         if (time() < $accessToken->getIssueTime() + $accessToken->getExpiresIn()) {
             // not expired
             return $accessToken;
         }
         // expired, delete it and continue
         $this->tokenStorage->deleteAccessToken($accessToken);
     }
     // no valid access token, is there a refresh_token?
     $refreshToken = $this->getRefreshToken($context);
     if (false !== $refreshToken) {
         // obtain a new access token with refresh token
         $tokenRequest = new TokenRequest($this->httpClient, $this->clientConfig);
         $tokenResponse = $tokenRequest->withRefreshToken($refreshToken->getRefreshToken());
         if (false === $tokenResponse) {
             // unable to fetch with RefreshToken, delete it
             $this->tokenStorage->deleteRefreshToken($refreshToken);
             return false;
         }
         if (null === $tokenResponse->getScope()) {
             // no scope in response, we assume we got the requested scope
             $scope = $context->getScope();
         } else {
             // the scope we got should be a superset of what we requested
             $scope = $tokenResponse->getScope();
             if (!$scope->hasScope($context->getScope())) {
                 // we didn't get the scope we requested, stop for now
                 // FIXME: we need to implement a way to request certain
                 // scope as being optional, while others need to be
                 // required
                 throw new ApiException('requested scope not obtained');
             }
         }
         $accessToken = new AccessToken(array('client_config_id' => $this->clientConfigId, 'user_id' => $context->getUserId(), 'scope' => $scope, 'access_token' => $tokenResponse->getAccessToken(), 'token_type' => $tokenResponse->getTokenType(), 'issue_time' => time(), 'expires_in' => $tokenResponse->getExpiresIn()));
         $this->tokenStorage->storeAccessToken($accessToken);
         if (null !== $tokenResponse->getRefreshToken()) {
             // delete the existing refresh token as we'll store a new one
             $this->tokenStorage->deleteRefreshToken($refreshToken);
             $refreshToken = new RefreshToken(array('client_config_id' => $this->clientConfigId, 'user_id' => $context->getUserId(), 'scope' => $scope, 'refresh_token' => $tokenResponse->getRefreshToken(), 'issue_time' => time()));
             $this->tokenStorage->storeRefreshToken($refreshToken);
         }
         return $accessToken;
     }
     // no access token, and refresh token didn't work either or was not there, probably the tokens were revoked
     return false;
 }