Update README.md

Author: logankilpatrick

README.md

@@ -1 +1,24 @@
 # Slack
+
+## Usage
+
+Here is a simple exmaple: 
+```julia
+julia> using Slack
+
+julia> endpoint = "/services/TQVJBU534/BR8C1LMPS/42thawJz34SWSgZCpniyLBSE"
+"/services/TQVJBU534/BR8C1LMPS/42thawJz34SWSgZCpniyLBSE"
+
+julia> data = "Hello World"
+"Hello World"
+
+julia> response = sendtoslack(data, endpoint)
+"ok"
+```
+
+To learn more about how data should be formatted before sending it as a argument to the above code, check out the [Slack API Docs](https://api.slack.com/messaging/composing/formatting).
+
+## Testing
+I have gone through the trouble of setting up a Slack Workspace in order to test this package. After this is all stabilized, I will remove the endpoint from the Slack Workspace and deprecate the examples you see throughout this repo. 
+
+In the meantime, I cannot stop you from using the end point URL I have setup.  Please use it responsibily.