private static final long serialVersionUID = 1L;

    /**
     * Constructs a new FessUserNotFoundException with the specified username.
     *
     * @param username the username that was not found
     */
    public FessUserNotFoundException(final String username) {
        super("User is not found: " + username);
    }

    }

    /**
     * Finds a login user by username.
     *
     * @param username the username to search for
     * @return an optional entity containing the found user, or empty if not found
     */
    @Override
    protected OptionalEntity<FessUser> doFindLoginUser(final String username) {
        return userBhv.selectEntity(cb -> {
            cb.query().setName_Equal(username);
        }).map(user -> (FessUser) user);
    }

     * @param username the username to authenticate with
     * @param password the password to authenticate with
     */
    public NtlmPasswordAuthentication(String domain, String username, final String password) {
        int ci;

        if (username != null) {
            ci = username.indexOf('@');
            if (ci > 0) {
                domain = username.substring(ci + 1);
                username = username.substring(0, ci);

    }

    private String maskUsername(String username) {
        if (!maskSensitiveData || username == null) {
            return username;
        }

        // Show first and last character only
        if (username.length() <= 2) {
            return "***";
        }

        return username.charAt(0) + "***" + username.charAt(username.length() - 1);
    }

     *
     * @param form the form containing duplicate host data
     * @param username the current username
     * @param currentTime the current timestamp
     * @return optional duplicate host entity
     */
    public static OptionalEntity<DuplicateHost> getEntity(final CreateForm form, final String username, final long currentTime) {
        switch (form.crudMode) {
        case CrudMode.CREATE:

    }

    /**
     * Returns the username for SMB authentication.
     * @return the username
     */
    public String getUsername() {
        return username;
    }

    /**
     * Sets the username for SMB authentication.
     * @param username the username to set
     */
    public void setUsername(final String username) {
        this.username = username;
    }

    /**

Oauth2️⃣ 🔧 👈 👩‍💻 ⚖️ 🛠️ 💪 🔬 💽 👈 🔓 👩‍💻.

✋️ 👉 💼, 🎏 **FastAPI** 🈸 🔜 🍵 🛠️ & 🤝.

, ➡️ 📄 ⚫️ ⚪️➡️ 👈 📉 ☝ 🎑:

* 👩‍💻 🆎 `username` & `password` 🕸, & 🎯 `Enter`.
* 🕸 (🏃‍♂ 👩‍💻 🖥) 📨 👈 `username` & `password` 🎯 📛 👆 🛠️ (📣 ⏮️ `tokenUrl="token"`).
* 🛠️ ✅ 👈 `username` & `password`, & 📨 ⏮️ "🤝" (👥 🚫 🛠️ 🙆 👉).
    *  "🤝" 🎻 ⏮️ 🎚 👈 👥 💪 ⚙️ ⏪ ✔ 👉 👩‍💻.
    * 🛎, 🤝 ⚒ 🕛 ⏮️ 🕰.

     *
     * @param form the create form
     * @param username the current username
     * @param currentTime the current time
     * @return optional key match entity
     */
    public static OptionalEntity<KeyMatch> getEntity(final CreateForm form, final String username, final long currentTime) {
        switch (form.crudMode) {
        case CrudMode.CREATE:

So, let's review it from that simplified point of view:

* The user types the `username` and `password` in the frontend, and hits `Enter`.
* The frontend (running in the user's browser) sends that `username` and `password` to a specific URL in our API (declared with `tokenUrl="token"`).
* The API checks that `username` and `password`, and responds with a "token" (we haven't implemented any of this yet).

    }

    /**
     * Get the proxy username.
     *
     * @return username for the proxy server
     */
    public String getUserName() {
        return userName;
    }

    /**
     * Set the proxy username.
     *
     * @param userName username for the proxy server
     */
    public void setUserName(String userName) {
        this.userName = userName;
    }

    /**