From 78b88765ecaf5f60524c7879c5673eae91385c5e Mon Sep 17 00:00:00 2001
From: Ian <ianwallen@hotmail.com>
Date: Wed, 25 May 2022 16:41:00 -0300
Subject: [PATCH] use toString() instead of cast String or it will fail when
 using Spring configtree (#10980)

Resolves #10979
Co-authored-by: Bruno Oliveira da Silva <bruno@abstractj.com>
---
 .../authentication/ClientIdAndSecretCredentialsProvider.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/adapters/oidc/adapter-core/src/main/java/org/keycloak/adapters/authentication/ClientIdAndSecretCredentialsProvider.java b/adapters/oidc/adapter-core/src/main/java/org/keycloak/adapters/authentication/ClientIdAndSecretCredentialsProvider.java
index 186597c2af..fb78d0c0cb 100644
--- a/adapters/oidc/adapter-core/src/main/java/org/keycloak/adapters/authentication/ClientIdAndSecretCredentialsProvider.java
+++ b/adapters/oidc/adapter-core/src/main/java/org/keycloak/adapters/authentication/ClientIdAndSecretCredentialsProvider.java
@@ -45,7 +45,7 @@ public class ClientIdAndSecretCredentialsProvider implements ClientCredentialsPr
 
     @Override
     public void init(KeycloakDeployment deployment, Object config) {
-        clientSecret = (String) config;
+        clientSecret = (config == null ? null : config.toString());
     }
 
     @Override