final String tokenUrl = getParameter(TOKEN_URL);
        final String tokenPattern = getParameter(TOKEN_PATTERN);
        final List<Pair<String, String>> responseParams = new ArrayList<>();
        final String encoding = getParameter(ENCODING);
        if (StringUtil.isNotBlank(tokenUrl) && StringUtil.isNotBlank(tokenPattern)) {

We will soon also create the actual path operation.

/// info

If you are a very strict "Pythonista" you might dislike the style of the parameter name `tokenUrl` instead of `token_url`.

That's because it is using the same name as in the OpenAPI spec. So that if you need to investigate more about any of these security schemes you can just copy and paste it to find more information about it.

    * New docs about `root_path` and `servers` in [Additional Servers](https://fastapi.tiangolo.com/advanced/behind-a-proxy/#additional-servers).
    * Update OAuth2 examples to use a relative URL for `tokenUrl="token"` to make sure those examples keep working as-is even when behind a reverse proxy.
    * Initial PR [#1596](https://github.com/tiangolo/fastapi/pull/1596) by [@rkbeatss](https://github.com/rkbeatss).