Made the behaviour from PR #20 just the default onError callback

Author: geelen

README.md

@@ -266,17 +266,6 @@ The `props` values are end-to-end encrypted, so they can safely contain sensitiv
 
 By using the `onError` option, you can emit notifications or take other actions when an error response was to be emitted:
 
-```ts
-new OAuthProvider({
-  // ... other options ...
-  onError({ code, description, status, headers }) {
-    console.error(`Error ${code}: ${description}`)
-  }
-})
-```
-
-Or sending events to an external system as required:
-
 ```ts
 new OAuthProvider({
   // ... other options ...
@@ -300,6 +289,8 @@ new OAuthProvider({
 })
 ```
 
+By default, the `onError` callback is set to ``({ status, code, description }) => console.warn(`OAuth error response: ${status} ${code} - ${description}`)``.
+
 ## Implementation Notes
 
 ### End-to-end encryption

src/oauth-provider.ts

@@ -698,8 +698,10 @@ class OAuthProviderImpl {
     }
 
     this.options = {
+      accessTokenTTL: DEFAULT_ACCESS_TOKEN_TTL,
+      onError: ({ status, code, description }) =>
+        console.warn(`OAuth error response: ${status} ${code} - ${description}`),
       ...options,
-      accessTokenTTL: options.accessTokenTTL || DEFAULT_ACCESS_TOKEN_TTL,
     };
   }