Add header support

README.md

@@ -2,8 +2,8 @@
 Monitor GitHub events and clone repositories to search for secrets, and more.
 
 ## Overview
-GitMon allows an operator to continually monitor the GitHub Events API to collect
+GitMon allows an operator to continually monitor the [GitHub Events API](https://docs.github.com/en/rest/activity/events)
-metadata and look for secret leakage.
+to collect metadata and look for secret leakage.
 
 When certain events such as _CreateEvent_ or _DeleteEvent_ are observed, GitMon
 will send the repository URL to a worker that will clone the repository and

gitmon/api.py

@@ -6,13 +6,15 @@ from requests.packages.urllib3.util.retry import Retry
 
 
 class GitHubApi:
-    def __init__(self, proxy=None):
+    def __init__(self, headers=None, proxy=None):
         self.base_url = 'https://api.github.com'
         self.session = requests.Session()
 
         retries = Retry(total=3, backoff_factor=1)
         self.session.mount('https://', HTTPAdapter(max_retries=retries))
 
+        if headers:
+            self.session.headers.update(headers)
         if proxy:
             self.session.proxies.update(proxy)