fix: don't auto-populate non-existing secret entries

freqtrade/configuration/config_secrets.py

@@ -37,8 +37,10 @@ def sanitize_config(config: Config, *, show_sensitive: bool = False) -> Config:
             nested_config = config
             for nested_key in nested_keys[:-1]:
                 nested_config = nested_config.get(nested_key, {})
-            nested_config[nested_keys[-1]] = "REDACTED"
+            if nested_keys[-1] in nested_config:
+                nested_config[nested_keys[-1]] = "REDACTED"
         else:
-            config[key] = "REDACTED"
+            if key in config:
+                config[key] = "REDACTED"
 
     return config

tests/test_configuration.py

@@ -1653,9 +1653,12 @@ def test_sanitize_config(default_conf_usdt):
     res = sanitize_config(default_conf_usdt)
     # Didn't modify original dict
     assert default_conf_usdt["exchange"]["key"] != "REDACTED"
+    assert "accountId" not in default_conf_usdt["exchange"]
 
     assert res["exchange"]["key"] == "REDACTED"
     assert res["exchange"]["secret"] == "REDACTED"
+    # Didn't add a non-existing key
+    assert "accountId" not in res["exchange"]
 
     res = sanitize_config(default_conf_usdt, show_sensitive=True)
     assert res["exchange"]["key"] == default_conf_usdt["exchange"]["key"]