Bug on 412 Http status code

[andrea-wood]

Hi, using the invitation endpoint on Microsoft Graph for a guest user that already exists on the directory I have an internal server error. The http status code returned from Graph Api is 412, that it seems not supported by the library.

Here the code I'm using:

` try {

	    $accessToken = $this->getAccessToken(['https://graph.microsoft.com/.default']);

	    $graph = new Graph();
	    $graph->setAccessToken($accessToken);
	    
	    return  $graph->createRequest("POST", "/invitations")
	    			  ->addHeaders(array("Content-Type" => "application/json"))
	    			  ->attachBody([
							"invitedUserDisplayName" => "some values",
							"invitedUserEmailAddress" =>"email",
							"sendInvitationMessage" => false,
							"inviteRedirectUrl" => "https://test.com"
						])
	                  ->setReturnType(Model\Invitation::class)
	                  ->execute();
	} catch (ClientException $e) {
	    if ($e->hasResponse()) {
	        dump(Psr7\str($e->getResponse()));
	    }
	}
	    

` EDIT: The bug occurs if the user already exists in the directory but his account was previously blocked.

AB#7368