add lumen docs

Author: charholt

src/connections/destinations/lumen/index.md

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+# Lumen Destination
+
+[Lumen](https://uselumen.co/?utm_source=segmentio&utm_medium=docs&utm_campaign=partners) helps companies engage efficiently with the right customers with ease via data-driven messaging through push notifications, SMS and emails to meet business and marketing objectives.
+
+From drip campaigns, special coupon offers, growth hacking, activating inactive customers, e.t.c., we do the heavy lifting while you focus on other business operations.
+
+
+This destination is maintained by Lumen. For any issues with the destination, [contact the Lumen Support team](mailto:[email protected]).
+
+
+
+## Getting Started
+
+
+{% include content/connection-modes.md %}
+
+1. From the Destinations catalog page in the Segment App, click **Add Destination**.
+2. Search for "Lumen" in the Destinations Catalog, and select the "Lumen" destination.
+3. Choose which Source should send data to the "Lumen" destination.
+4. Go to the [Lumen dashboard](https://app.uselumen.co){:target="_blank"}, visit the settings page, navigate to the API tab and copy your "API key".
+5. Enter the "API Key" in the "Lumen" destination settings in Segment.
+
+## Supported methods
+
+Lumen supports the following methods, as specified in the [Segment Spec](/docs/connections/spec).
+
+### Identify
+
+Send [Identify](/docs/connections/spec/identify) calls to create or update a user's record. The `userId` becomes the user's primary identifier.
+
+```js
+analytics.identify('userId123', {
+  email: '[email protected]'
+});
+```
+
+If the identifier doesn't exist, a new user record is created. If the identifier already exist, we update the user record For example:
+
+Segment sends Identify calls to Lumen as an `identify` event.
+
+
+### Track
+
+Send [Track](/docs/connections/spec/track) calls to track a user's activity or action. For example:
+
+```js
+analytics.track('Login Button Clicked')
+```
+
+Segment sends Track calls to Lumen as a `track` event.
+
+---