Issuer in discovery json

Signed-off-by: Juan Manuel Lallana <[email protected]>

Author: jlallana

apps/oauth2/lib/Controller/OauthApiController.php

@@ -198,6 +198,7 @@ public function getToken($grant_type, $code, $refresh_token, $client_id, $client
 	public function discovery() {
 		$util = new Util();
 		return new JSONResponse([
+			'issuer' => $this->urlGenerator->linkToRouteAbsolute(''),
 			'authorization_endpoint' => $this->urlGenerator->linkToRouteAbsolute('oauth2.LoginRedirector.authorize'),
 			'token_endpoint' => $this->urlGenerator->linkToRouteAbsolute('oauth2.OauthApi.getToken'),
 			'userinfo_endpoint' => $this->urlGenerator->linkToRouteAbsolute('oauth2.OauthApi.getUserInfo')