docs: Add a minimal example

README.md

@@ -55,6 +55,59 @@ See [Poetry's Docs] on various ways of making calls under the virtual-environmen
   [Poetry]: <https://python-poetry.org>
   [Poetry's Docs]: <https://python-poetry.org/docs/basic-usage/#using-your-virtual-environment>
 
+## Usage
+
+The following is a minimal example of using pywidevine in a script. It gets a License for Bitmovin's
+Art of Motion Demo. There's various stuff not shown in this specific example like:
+
+- Privacy Mode
+- Setting Service Certificates
+- Remote CDMs and Serving
+- Choosing a License Type to request
+- Creating WVD files
+- and much more!
+
+Just take a look around the Cdm code to see what stuff does. Everything is documented quite well.
+There's also various functions in `main.py` that showcases a lot of features.
+
+```py
+from pywidevine.cdm import Cdm
+from pywidevine.device import Device
+from pywidevine.pssh import PSSH
+
+import requests
+
+# prepare pssh
+pssh = PSSH("AAAAW3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAADsIARIQ62dqu8s0Xpa"
+            "7z2FmMPGj2hoNd2lkZXZpbmVfdGVzdCIQZmtqM2xqYVNkZmFsa3IzaioCSEQyAA==")
+
+# load device
+device = Device.load("C:/Path/To/A/Provision.wvd")
+
+# load cdm
+cdm = Cdm.from_device(device)
+
+# open cdm session
+session_id = cdm.open()
+
+# get license challenge
+challenge = cdm.get_license_challenge(session_id, pssh)
+
+# send license challenge (assuming a generic license server SDK with no API front)
+licence = requests.post("https://...", data=challenge)
+licence.raise_for_status()
+
+# parse license challenge
+cdm.parse_license(session_id, licence.content)
+
+# print keys
+for key in cdm.get_keys(session_id):
+    print(f"[{key.type}] {key.kid.hex}:{key.key.hex()}")
+
+# close session, disposes of session data
+cdm.close(session_id)
+```
+
 ## Troubleshooting
 
 ### Executable `pywidevine` was not found