fix build_url_request when method is None (#1041)

Author: piax93

tron/commands/client.py

@@ -54,7 +54,7 @@ def build_url_request(uri, data, headers=None, method=None):
     headers = headers or default_headers
     enc_data = urllib.parse.urlencode(data).encode() if data else None
     # Currently implementing auth only for management actions (i.e. POST requests)
-    if os.getenv("TRONCTL_API_AUTH") and (data or method.upper() == "POST"):
+    if os.getenv("TRONCTL_API_AUTH") and (data or (method and method.upper() == "POST")):
         token = get_sso_auth_token()
         if token:
             headers["Authorization"] = f"Bearer {token}"