fix(jwt): add jwt encode for test

jwt_encode.py

@@ -0,0 +1,20 @@
+import jwt  # pip install pyjwt
+import time
+
+with open("neuron.key", "r") as f:
+    private_key = f.read()
+
+current_time = int(time.time())
+two_years = 60 * 60 * 24 * 365 * 2
+header = {"alg": "RS256", "typ": "JWT"}
+payload = {
+    "aud": "neuron",
+    "bodyEncode": 0,
+    "exp": current_time + two_years,
+    "iat": current_time,
+    "iss": "neuron",
+}
+token = jwt.encode(payload, private_key, algorithm="RS256", headers=header).decode(
+    "utf-8"
+)
+print(f"Bearer {token}")