diff --git a/pr_agent/servers/github_action_runner.py b/pr_agent/servers/github_action_runner.py
index 65643772..2aa424d7 100644
--- a/pr_agent/servers/github_action_runner.py
+++ b/pr_agent/servers/github_action_runner.py
@@ -8,50 +8,61 @@ from pr_agent.tools.pr_reviewer import PRReviewer
 
 
 async def run_action():
-    GITHUB_EVENT_NAME = os.environ.get('GITHUB_EVENT_NAME', None)
+    # Get environment variables
+    GITHUB_EVENT_NAME = os.environ.get('GITHUB_EVENT_NAME')
+    GITHUB_EVENT_PATH = os.environ.get('GITHUB_EVENT_PATH')
+    OPENAI_KEY = os.environ.get('OPENAI_KEY')
+    OPENAI_ORG = os.environ.get('OPENAI_ORG')
+    GITHUB_TOKEN = os.environ.get('GITHUB_TOKEN')
+
+    # Check if required environment variables are set
     if not GITHUB_EVENT_NAME:
         print("GITHUB_EVENT_NAME not set")
         return
-    GITHUB_EVENT_PATH = os.environ.get('GITHUB_EVENT_PATH', None)
     if not GITHUB_EVENT_PATH:
         print("GITHUB_EVENT_PATH not set")
         return
-    try:
-        event_payload = json.load(open(GITHUB_EVENT_PATH, 'r'))
-    except json.decoder.JSONDecodeError as e:
-        print(f"Failed to parse JSON: {e}")
-        return
-    OPENAI_KEY = os.environ.get('OPENAI_KEY', None)
     if not OPENAI_KEY:
         print("OPENAI_KEY not set")
         return
-    OPENAI_ORG = os.environ.get('OPENAI_ORG', None)
-    GITHUB_TOKEN = os.environ.get('GITHUB_TOKEN', None)
     if not GITHUB_TOKEN:
         print("GITHUB_TOKEN not set")
         return
+
+    # Set the environment variables in the settings
     settings.set("OPENAI.KEY", OPENAI_KEY)
     if OPENAI_ORG:
         settings.set("OPENAI.ORG", OPENAI_ORG)
     settings.set("GITHUB.USER_TOKEN", GITHUB_TOKEN)
     settings.set("GITHUB.DEPLOYMENT_TYPE", "user")
+
+    # Load the event payload
+    try:
+        with open(GITHUB_EVENT_PATH, 'r') as f:
+            event_payload = json.load(f)
+    except json.decoder.JSONDecodeError as e:
+        print(f"Failed to parse JSON: {e}")
+        return
+
+    # Handle pull request event
     if GITHUB_EVENT_NAME == "pull_request":
-        action = event_payload.get("action", None)
+        action = event_payload.get("action")
         if action in ["opened", "reopened"]:
-            pr_url = event_payload.get("pull_request", {}).get("url", None)
+            pr_url = event_payload.get("pull_request", {}).get("url")
             if pr_url:
                 await PRReviewer(pr_url).review()
 
+    # Handle issue comment event
     elif GITHUB_EVENT_NAME == "issue_comment":
-        action = event_payload.get("action", None)
+        action = event_payload.get("action")
         if action in ["created", "edited"]:
-            comment_body = event_payload.get("comment", {}).get("body", None)
+            comment_body = event_payload.get("comment", {}).get("body")
             if comment_body:
-                pr_url = event_payload.get("issue", {}).get("pull_request", {}).get("url", None)
+                pr_url = event_payload.get("issue", {}).get("pull_request", {}).get("url")
                 if pr_url:
                     body = comment_body.strip().lower()
                     await PRAgent().handle_request(pr_url, body)
 
 
 if __name__ == '__main__':
-    asyncio.run(run_action())
+    asyncio.run(run_action())
\ No newline at end of file