diff --git a/api/src/data_inclusion/api/core/auth.py b/api/src/data_inclusion/api/core/auth.py
index 5399487f..88fbc870 100644
--- a/api/src/data_inclusion/api/core/auth.py
+++ b/api/src/data_inclusion/api/core/auth.py
@@ -16,6 +16,9 @@ def on_error(conn: HTTPConnection, exc: Exception) -> responses.Response:
 
 class AuthenticationBackend(authentication.AuthenticationBackend):
     async def authenticate(self, conn):
+        if "Authorization" not in conn.headers:
+            return
+
         http_bearer_instance = HTTPBearer()
 
         try:
diff --git a/api/src/data_inclusion/api/core/request/services.py b/api/src/data_inclusion/api/core/request/services.py
index 8cdf7e5f..738edc8a 100644
--- a/api/src/data_inclusion/api/core/request/services.py
+++ b/api/src/data_inclusion/api/core/request/services.py
@@ -11,7 +11,7 @@ def save_request(request: requests.Request, response: responses.Response) -> Non
             method=request.method,
             path=request.url.path,
             base_url=str(request.base_url),
-            user=request.user.username,
+            user=request.user.username if request.user.is_authenticated else None,
             path_params=request.path_params,
             query_params=dict(request.query_params),
             client_host=request.client.host,
diff --git a/api/tests/core/test_request.py b/api/tests/core/test_request.py
index 150fb0cb..78cce9f5 100644
--- a/api/tests/core/test_request.py
+++ b/api/tests/core/test_request.py
@@ -28,4 +28,13 @@ def test_save_api_request_without_token(api_client, db_session):
     response = api_client.get(url)
 
     assert response.status_code == 403
-    assert db_session.query(models.Request).count() == 0
+    assert db_session.query(models.Request).count() == 1
+
+    request_instance = db_session.query(models.Request).first()
+    assert request_instance.status_code == 403
+    assert request_instance.user is None
+    assert request_instance.path == "/api/v0/structures"
+    assert request_instance.method == "GET"
+    assert request_instance.path_params == {}
+    assert request_instance.query_params == {}
+    assert request_instance.endpoint_name == "list_structures_endpoint"