Document how to set up Oauth authentication

Thanks @yarik.lutsiuk for the documentation.

As seen together, I will complete it to be like a fllow guide without need to think.

Also I got the following error, because of my setup. I guess this is because Guzzle options from settings.php to not verify SSL are not transmitted to the Oauth2 client library.

I will check how to do that.

GuzzleHttp\Exception\RequestException: cURL error 60: SSL certificate problem: unable to get local issuer certificate (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) in GuzzleHttp\Handler\CurlFactory::createRejection() (line 201 of /project/vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php).
GuzzleHttp\Handler\CurlFactory::finishError(Object, Object, Object) (Line: 105)
GuzzleHttp\Handler\CurlFactory::finish(Object, Object, Object) (Line: 43)
GuzzleHttp\Handler\CurlHandler->__invoke(Object, Array) (Line: 28)
GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler\{closure}(Object, Array) (Line: 51)
GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler\{closure}(Object, Array) (Line: 66)
GuzzleHttp\PrepareBodyMiddleware->__invoke(Object, Array) (Line: 29)
GuzzleHttp\Middleware::GuzzleHttp\{closure}(Object, Array) (Line: 70)
GuzzleHttp\RedirectMiddleware->__invoke(Object, Array) (Line: 59)
GuzzleHttp\Middleware::GuzzleHttp\{closure}(Object, Array) (Line: 71)
GuzzleHttp\HandlerStack->__invoke(Object, Array) (Line: 351)
GuzzleHttp\Client->transfer(Object, Array) (Line: 112)
GuzzleHttp\Client->sendAsync(Object, Array) (Line: 129)
GuzzleHttp\Client->send(Object) (Line: 608)
League\OAuth2\Client\Provider\AbstractProvider->getResponse(Object) (Line: 621)
League\OAuth2\Client\Provider\AbstractProvider->getParsedResponse(Object) (Line: 537)
League\OAuth2\Client\Provider\AbstractProvider->getAccessToken(Object, Array) (Line: 307)
Drupal\entity_share_client\Plugin\ClientAuthorization\Oauth->initalizeToken(Object, Array) (Line: 251)
Drupal\entity_share_client\Plugin\ClientAuthorization\Oauth->submitConfigurationForm(Array, Object) (Line: 110)
Drupal\entity_share_client\Form\RemoteForm->submitForm(Array, Object)
call_user_func_array(Array, Array) (Line: 114)
Drupal\Core\Form\FormSubmitter->executeSubmitHandlers(Array, Object) (Line: 52)
Drupal\Core\Form\FormSubmitter->doSubmitForm(Array, Object) (Line: 593)
Drupal\Core\Form\FormBuilder->processForm('remote_edit_form', Array, Object) (Line: 321)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 91)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 573)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 151)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 67)
Drupal\simple_oauth\HttpMiddleware\BasicAuthSwap->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
require('/project/app/index.php') (Line: 4)
The website encountered an unexpected error. Please try again later.

To not forget.

Precise to add the permission "Grant OAuth2 codes" to the role set up in the consumer.

Add a trim on all the configuration fields :) (strange, I thought it was automatic by the form API)

I have created the following documentation page https://www.drupal.org/docs/contributed-modules/entity-share/authorizati....

If you can give a look for confirmation.

Hello @yarik.lutsiuk,

Thanks for the feedback! :)