diff --git a/hypopub.py b/hypopub.py
index 4874bcf..48e520b 100644
--- a/hypopub.py
+++ b/hypopub.py
@@ -19,6 +19,8 @@ session = requests.session()
 token = os.getenv("MICROPUB_TOKEN")
 session.headers = {"Authorization": f"Bearer {token}"}
 
+HYPOTHESIS_USER=os.getenv("HYPOTHESIS_USER")
+
 def send_micropub(entry: atoma.atom.AtomEntry):
 
     # get the json corresponding to the annotation
@@ -49,7 +51,10 @@ def send_micropub(entry: atoma.atom.AtomEntry):
 
 def main():
 
-    response = requests.get("https://hypothes.is/stream.atom?user=ravenscroftj")
+    if HYPOTHESIS_USER is None:
+        raise Exception("You must set HYPOTHESIS_USER environment variable")
+
+    response = requests.get(f"https://hypothes.is/stream.atom?user={HYPOTHESIS_USER}")
     feed = atoma.parse_atom_bytes(response.content)
 
     print(f"Processing {feed.title.value}")