allow client creation without authorization

mergin/client.py

@@ -157,10 +157,6 @@ def __init__(
                 if not self._auth_session:
                     self.login(login, password)
 
-        else:
-            if not self._auth_session:
-                raise ClientError("Unable to log in: no auth token provided for login")
-
     def setup_logging(self):
         """Setup Mergin Maps client logging."""
         client_log_file = os.environ.get("MERGIN_CLIENT_LOG", None)

mergin/test/test_client.py

@@ -2871,3 +2871,18 @@ def server_config(self):
 
     with pytest.raises(ClientError, match="The requested URL was not found on the server"):
         mc.send_logs(logs_path)
+
+
+def test_mc_without_login():
+
+    # client without login should be able to access server config
+    mc = MerginClient(SERVER_URL)
+    config = mc.server_config()
+    assert config
+    assert isinstance(config, dict)
+    assert "server_configured" in config
+    assert config["server_configured"]
+
+    # without login should not be able to access workspaces
+    with pytest.raises(ClientError, match="The requested URL was not found on the server"):
+        mc.workspaces_list()