fix: readme and usage examples

Author: cjbell

README.md

@@ -11,7 +11,7 @@ See the [documentation](https://docs.knock.app) for Python usage examples.
 To install from PyPi, run the following:
 
 ```bash
-pip install knock-py
+pip install knockapi
 ```
 
 To install from source, clone the repo and run the following:
@@ -25,7 +25,43 @@ python setup.py install
 To use the library you must provide a secret API key, provided in the Knock dashboard.
 
 ```python
-import knock
+from knockapi import Knock
+client = Knock(api_key="sk_12345")
+```
+
+## Usage
+
+### Identifying users
+
+```python
+from knockapi import Knock
+client = Knock(api_key="sk_12345")
+
+client.users.identify(id="jhammond", data={"name": "John Hammond", "email": "[email protected]"})
+```
+
+## Retrieving users
+
+```python
+from knockapi import Knock
+client = Knock(api_key="sk_12345")
+
+client.users.get_user(id="jhammond")
+```
+
+### Sending notifies
+
+```python
+from knockapi import Knock
+client = Knock(api_key="sk_12345")
 
-knock.api_key = "sk_12345"
+client.notify(
+  name="dinosaurs-loose",
+  actor="dnedry",
+  recipients=["jhammond", "agrant", "imalcolm", "esattler"],
+  data={
+    "type": "trex",
+    "priority": 1
+  }
+)
 ```