Added config example.

Author: mooreds

docs/config-examples/fusionauth.md

@@ -0,0 +1,28 @@
+# FusionAuth
+
+FusionAuth does not specify a revocation endpoint so revoke functionality doesn't work. Other than that, full functionality is available.
+
+* [Install FusionAuth](https://fusionauth.io/docs/v1/tech/installation-guide).
+* Create an application in the admin screen. Note the client id.
+* Set the redirect_uri for the application to be a value like `fusionauth.demo:/oauthredirect` where `fusionauth.demo` is a scheme you've registered in your application.
+
+Use the following configuration (replacing the `clientId` with your application id and `fusionAuth.demo` with your scheme):
+
+```js
+const config = {
+  issuer: 'http://localhost:9011',
+  clientId: '253eb7aa-687a-4bf3-b12b-26baa40eecbf',
+  redirectUrl: 'fusionauth.demo:/callback'
+  scopes: ['offline_access', 'openid']
+};
+
+// Log in to get an authentication token
+const authState = await authorize(config);
+
+// Refresh token
+const refreshedState = await refresh(config, {
+  refreshToken: authState.refreshToken,
+});
+```
+
+