diff --git a/src/server/lib/oauth/client.js b/src/server/lib/oauth/client.js
index 5c3e6a0d54..7ef9ae3863 100644
--- a/src/server/lib/oauth/client.js
+++ b/src/server/lib/oauth/client.js
@@ -167,9 +167,17 @@ async function getOAuth2AccessToken (code, provider, codeVerifier) {
           raw = querystring.parse(data)
         }
 
-        const accessToken = provider.id === 'slack'
-          ? raw.authed_user.access_token
-          : raw.access_token
+        let accessToken
+        if (provider.id === 'slack') {
+          const { ok, error } = raw
+          if (!ok) {
+            return reject(error)
+          }
+
+          accessToken = raw.authed_user.access_token
+        } else {
+          accessToken = raw.access_token
+        }
 
         resolve({
           accessToken,