diff --git a/README.md b/README.md
index e9810ea8..92dfef87 100644
--- a/README.md
+++ b/README.md
@@ -111,6 +111,8 @@ The `initialize()` function returns a promise that resolves when the Launch Dark
 
 The user `key` is the only required attribute, see the [Launch Darkly documentation](https://docs.launchdarkly.com/docs/js-sdk-reference#section-users) for the other attributes you can provide.
 
+The `initialize()` function accepts a second parameter, an object, which is **optional**. It allows to you configure the Launch Darkly client, see the [Launch Darkly documentation](https://docs.launchdarkly.com/sdk/client-side/javascript#customizing-your-client) to learn more about available options and default values.
+
 ```js
 // /app/application/route.js
 
@@ -123,7 +125,12 @@ export default Route.extend({
       anonymous: true
     };
 
-    return this.launchDarkly.initialize(user);
+    let options = {
+      sendEvents: false, // default is true, see https://docs.launchdarkly.com/sdk/client-side/javascript#analytics-events
+      hash: "SERVER_GENERATED_HASH", // see https://docs.launchdarkly.com/sdk/client-side/javascript#secure-mode
+    };
+
+    return this.launchDarkly.initialize(user, options);
   }
 });
 ```
diff --git a/addon/services/launch-darkly-client-remote.js b/addon/services/launch-darkly-client-remote.js
index 19c9e9bd..9d3e4e51 100644
--- a/addon/services/launch-darkly-client-remote.js
+++ b/addon/services/launch-darkly-client-remote.js
@@ -16,13 +16,16 @@ export default Service.extend(Evented, {
     this._super(...arguments);
   },
 
-  initialize(user = {}) {
+  initialize(user = {}, options = {}) {
     let { clientSideId, streaming = false } = this._config();
 
-    assert('ENV.launchDarkly.clientSideId must be specified in config/environment.js', clientSideId);
+    if (!clientSideId) {
+      clientSideId = options.clientSideId; // let this be deferred, maybe an API provided it
+      delete options.clientSideId;
+    }
 
     if (!clientSideId) {
-      warn('ENV.launchDarkly.clientSideId not specified. Defaulting all feature flags to "false"', false, { id: 'ember-launch-darkly.client-id-not-specified' });
+      warn('ENV.launchDarkly.clientSideId not specified or provided via user hash. Defaulting all feature flags to "false"', false, { id: 'ember-launch-darkly.client-id-not-specified' });
 
       this.set('_client', NullClient);
 
@@ -39,7 +42,7 @@ export default Service.extend(Evented, {
       return RSVP.resolve();
     }
 
-    return this._initialize(clientSideId, user, streaming);
+    return this._initialize(clientSideId, user, streaming, options);
   },
 
   identify(user) {
@@ -60,9 +63,10 @@ export default Service.extend(Evented, {
     return appConfig.launchDarkly || {};
   },
 
-  _initialize(id, user, streamingOptions) {
+  _initialize(id, user, streamingOptions, options = {}) {
     return new RSVP.Promise((resolve, reject) => {
-      let client = initialize(id, user);
+
+      let client = initialize(id, user, options);
 
       client.on('ready', () => {
         this.set('_client', client);