Ask for basic auth in html page

To ask for basic authentication in an HTML page, you can use the following code snippet:

<form method="post" action="">
  <label for="username">Username:</label>
  <input type="text" id="username" name="username"><br><br>
  <label for="password">Password:</label>
  <input type="password" id="password" name="password"><br><br>
  <button type="submit">Login</button>
</form>

This form will prompt the user to enter their username and password, which can then be sent to the server using the HTTP POST method. The server can then check the credentials and grant access to the protected resource if they are correct. Note that this form alone does not provide any actual security - it is up to the server to implement the authentication mechanism and protect the resource appropriately.