Do it.

src/snek/sgit.py

@@ -41,9 +41,25 @@ class GitApplication(web.Application):
             web.post('/{repo_name}.git/git-receive-pack', self.git_smart_http),
         ])
 
+
     async def check_basic_auth(self, request):
-        # For now, always return the fixed user and path
-        return "retoor", pathlib.Path(self.REPO_DIR)
+        auth_header = request.headers.get("Authorization", "")
+        if not auth_header.startswith("Basic "):
+            return None,None
+        encoded_creds = auth_header.split("Basic ")[1]
+        decoded_creds = base64.b64decode(encoded_creds).decode()
+        username, password = decoded_creds.split(":", 1)
+        request["user"] = await self.parent.services.user.authenticate(
+            username=username, password=password
+        )
+        if not request["user"]:
+            return None,None
+        request["repository_path"] = await self.parent.services.user.get_repository_path(
+            request["user"]["uid"]
+        )
+
+        return request["user"]['username'],request["repository_path"]
+
 
     @staticmethod
     def require_auth(handler):