update quickstart installer to use realm config [skip-ci]
@@ -13,7 +13,7 @@ This tutorial assumes you are starting fresh and have no existing collectd agent
```sh
curl -sSL https://dl.signalfx.com/signalfx-agent.sh > /tmp/signalfx-agent.sh
-sudo sh /tmp/signalfx-agent.sh YOUR_SIGNALFX_API_TOKEN
+sudo sh /tmp/signalfx-agent.sh --realm YOUR_SIGNALFX_REALM YOUR_SIGNALFX_API_TOKEN
```
##### Windows
