Merge pull request #499 from artoonie/update-readme

improve readme

README.md

@@ -122,7 +122,7 @@ To get started with programmatic access to rcvis:
 
 1. Create an account on RCVis
 2. Email [email protected] to enable API access
-3. Submit a POST request to [https://www.rcvis.com/api/auth/get-token](https://www.rcvis.com/api/auth/get-token) to obtain an API Key, e.g. `POST https://www.rcvis.com/api/auth/get-token {"username": "username", "password": "password"}`.
+3. Submit a POST request to [https://www.rcvis.com/api/auth/get-token](https://www.rcvis.com/api/auth/get-token) to obtain an API Key, e.g. `curl -X POST https://www.rcvis.com/api/auth/get-token -d username=yourUserName -d password=yourAmazingPassword`
 
 With your API key, you may access two endpoints:
 1. [https://www.rcvis.com/api/visualizations/](https://www.rcvis.com/api/visualizations/) requires field `jsonFile` with the body of a valid summary JSON.