{!> ../../../docs_src/security/tutorial004.py!}
    ```

## Update the dependencies

Update `get_current_user` to receive the same token as before, but this time, using JWT tokens.

Decode the received token, verify it, and return the current user.

If the token is invalid, return an HTTP error right away.

=== "Python 3.10+"

    ```Python hl_lines="89-106"

	allowMACs := supportedMACs
	var err error
	for _, arg := range args {
		tokens := strings.SplitN(arg, "=", 2)
		if len(tokens) != 2 {
			logger.Fatal(fmt.Errorf("invalid arguments passed to --sftp=%s", arg), "unable to start SFTP server")
		}
		switch tokens[0] {
		case "address":
			host, portStr, err := net.SplitHostPort(tokens[1])
			if err != nil {

        for (String token : range.split(",")) {
            if (token.startsWith("[")) {
                ranges.add(new RangeValue(token.replace("[", ""), true));
            } else if (token.startsWith("(")) {
                ranges.add(new RangeValue(token.replace("(", ""), false));
            } else if (token.endsWith("]")) {
                ranges.add(new RangeValue(token.replace("]", ""), true));

		},
	},
}

func mainHandler(w http.ResponseWriter, r *http.Request) {
	token := r.FormValue("token")
	if token == "" {
		writeErrorResponse(w, errors.New("token parameter not given"))
		return
	}

	rsp, ok := tokens[token]
	if !ok {
		w.WriteHeader(http.StatusForbidden)
		return
	}

	fmt.Printf("Allowed for token: %s user: %s\n", token, rsp.User)

	w.WriteHeader(http.StatusOK)
	json.NewEncoder(w).Encode(rsp)

## Return the token

The response of the `token` endpoint must be a JSON object.

It should have a `token_type`. In our case, as we are using "Bearer" tokens, the token type should be "`bearer`".

And it should have an `access_token`, with a string containing our access token.

}

// AssumeRoleWithCustomToken implements user authentication with custom tokens.
// These tokens are opaque to MinIO and are verified by a configured (external)
// Identity Management Plugin.
//
// API endpoint: https://minio:9000?Action=AssumeRoleWithCustomToken&Token=xxx
func (sts *stsAPIHandlers) AssumeRoleWithCustomToken(w http.ResponseWriter, r *http.Request) {

	case "true", `"true"`: // true without double quotes is deprecated in Feb 2022
		if len(tokens) == 1 {
			return ongoingRestoreObj(), nil
		}
	case "false", `"false"`: // false without double quotes is deprecated in Feb 2022
		if len(tokens) != 2 {
			return restoreObjStatus{}, errRestoreHDRMalformed
		}
		expiryTokens := strings.SplitN(tokens[1], "=", 2)
		if len(expiryTokens) != 2 {

        {{- end }}
        {{- end }}
        volumeMounts:
        - mountPath: /var/run/secrets/istio
          name: istiod-ca-cert
        - mountPath: /var/run/secrets/tokens
          name: istio-token
        - mountPath: /var/run/ztunnel
          name: cni-ztunnel-sock-dir
        - mountPath: /tmp
          name: tmp
        {{- with .Values.volumeMounts }}
          {{- toYaml . | nindent 8 }}

## 返回 Token

`token` 端点的响应必须是 JSON 对象。

响应返回的内容应该包含 `token_type`。本例中用的是**Bearer**Token，因此， Token 类型应为**`bearer`**。

返回内容还应包含 `access_token` 字段，它是包含权限 Token 的字符串。

本例只是简单的演示，返回的 Token 就是 `username`，但这种方式极不安全。

!!! tip "提示"

    下一章介绍使用哈希密码和 <abbr title="JSON Web Tokens">JWT</abbr> Token 的真正安全机制。

    但现在，仅关注所需的特定细节。

```Python hl_lines="85"

      - emptyDir:
          medium: Memory
        name: local-certs
      - name: istio-token
        projected:
          sources:
            - serviceAccountToken:
                audience: {{ .Values.global.sds.token.aud }}
                expirationSeconds: 43200
                path: istio-token
      # Optional: user-generated root
      - name: cacerts
        secret:
          secretName: cacerts