chore: import upstream snapshot with attribution

03-GettingStarted/11-simple-auth/code/jwt-lab/python/README.md

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+# Run sample
+
+## Set up environment
+
+```sh
+python -m venv
+source ./venv/bin/activate
+```
+
+## Install dependencies
+
+```sh
+pip install PyJWT
+```
+
+## Run code
+
+```sh
+python lab.py
+```
+
+You should see output similar to:
+
+```text
+Encoded JWT: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IlVzZXIgVXNlcnNvbiIsImFkbWluIjp0cnVlLCJpYXQiOjE3NTkxNjgzMDEsImV4cCI6MTc1OTE3MTkwMX0.tz0UYNNtGVC61DWjVDF8xlhpNkp5XBtxmQH3m_RNwe8
+✅ Token is valid.
+Decoded claims:
+  sub: 1234567890
+  name: User Userson
+  admin: True
+  iat: 1759168301
+  exp: 1759171901
+```

03-GettingStarted/11-simple-auth/code/jwt-lab/python/lab.py

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+# pip install PyJWT
+
+# create a token
+import jwt
+from jwt.exceptions import ExpiredSignatureError, InvalidTokenError
+import datetime
+
+# Secret key used to sign the JWT
+secret_key = 'your-secret-key'
+
+header = {
+    "alg": "HS256",
+    "typ": "JWT"
+}
+
+# the user info andits claims and expiry time
+payload = {
+    "sub": "1234567890",               # Subject (user ID)
+    "name": "User Userson",                # Custom claim
+    "admin": True,                     # Custom claim
+    "iat": datetime.datetime.utcnow(),# Issued at
+    "exp": datetime.datetime.utcnow() + datetime.timedelta(hours=1)  # Expiry
+}
+
+# encode it
+encoded_jwt = jwt.encode(payload, secret_key, algorithm="HS256", headers=header)
+
+print("Encoded JWT:", encoded_jwt) 
+
+# validate a token
+try:
+    decoded = jwt.decode(encoded_jwt, secret_key, algorithms=["HS256"])
+    print("✅ Token is valid.")
+    print("Decoded claims:")
+    for key, value in decoded.items():
+        print(f"  {key}: {value}")
+except ExpiredSignatureError:
+    print("❌ Token has expired.")
+except InvalidTokenError as e:
+    print(f"❌ Invalid token: {e}")
+