}

    /** The username. */
    @NotBlank
    public String username;

    /** The password. */
    @NotBlank
    public String password;

    /** The confirm password. */
    public String confirmPassword;

    /**
     * Clears the security info.
     */
    public void clearSecurityInfo() {
        password = null;
        confirmPassword = null;
    }

If it doesn't receive it, it returns an HTTP 401 "Unauthorized" error.

And returns a header `WWW-Authenticate` with a value of `Basic`, and an optional `realm` parameter.

That tells the browser to show the integrated prompt for a username and password.

Then, when you type that username and password, the browser sends them in the header automatically.

    }

    @Test
    @DisplayName("handle: empty user/domain edge yields '@' and null password")
    void testHandleWithEmptyUserAndDomainEdge() throws Exception {
        // Default constructor results in empty strings for user and domain, null for password
        JAASAuthenticator auth = new JAASAuthenticator();
        NameCallback nc = new NameCallback("user:");

	}

	if err := DB.Model(&data).Update("password", EncryptedData("xnewpass")).Error; err == nil {
		t.Errorf("Should failed to update data with invalid data")
	}

	if err := DB.Model(&data).Update("password", EncryptedData("newpass")).Error; err != nil {
		t.Errorf("Should got no error update data with valid data, but got %v", err)
	}

	AssertEqual(t, data.Password, EncryptedData("newpass"))
}

        "arn:aws:s3:::*"
      ]
    }
  ]
}
```

### Visit <http://localhost:8080>

You will be redirected to dex login screen - click "Login with email", enter username password
> username: ******@****.***
> password: password

and then click "Grant access"

On the browser now you shall see the list of buckets output, along with your temporary credentials obtained from MinIO.

```
{
 "buckets": [

labels.suggestWord=Suggest Word
labels.targetLabel=Label
labels.term=Term
labels.fields=Fields
labels.ex_q=Extended Query
labels.oldPassword=Current Password
labels.newPassword=New Password
labels.confirmNewPassword=New Password (Confirm)

labels.menu_system=System
labels.menu_wizard=Wizard
labels.menu_crawl_config=General
labels.menu_scheduler_config=Scheduler
labels.menu_dashboard_config=Dashboard

            } else {
                // plain text
                password = new byte[(session.auth.password.length() + 1) * 2];
                passwordLength = writeString(session.auth.password, password, 0);
            }
        } else {
            // no password in tree connect
            passwordLength = 1;
        }

        dst[dstIndex] = disconnectTid ? (byte) 0x01 : (byte) 0x00;

        this.parameters = value;
    }

    public String getPassword() {
        checkSpecifiedProperty("password");
        return convertEmptyToNull(password);
    }

    public void setPassword(String value) {
        registerModifiedProperty("password");
        this.password = value;
    }

    public Integer getPort() {
        checkSpecifiedProperty("port");
        return port;
    }

        this.parameters = value;
    }

    public String getPassword() {
        checkSpecifiedProperty("password");
        return convertEmptyToNull(password);
    }

    public void setPassword(String value) {
        registerModifiedProperty("password");
        this.password = value;
    }

    public Integer getPort() {
        checkSpecifiedProperty("port");
        return port;
    }

Así que, revisémoslo desde ese punto de vista simplificado:

* El usuario escribe el `username` y `password` en el frontend, y presiona `Enter`.
* El frontend (ejecutándose en el navegador del usuario) envía ese `username` y `password` a una URL específica en nuestra API (declarada con `tokenUrl="token"`).
* La API verifica ese `username` y `password`, y responde con un "token" (no hemos implementado nada de esto aún).