How to authenticate with a username and password when using a proxy?

@mike 

To authenticate with a username and password when using a proxy, you need to configure your proxy settings to include your credentials. Here are the general steps to follow:

1. Open the proxy settings of the application or system you are using (e.g., web browser, operating system network settings, etc.).
2. Look for the Proxy Authentication section or something similar where you can enter the authentication details.
3. Provide the proxy server address and port in the respective fields. You may obtain this information from your proxy provider.
4. Enable the authentication option or tick the box that says "Use Authentication" or similar. This should reveal additional fields for username and password.
5. Enter your username and password in the appropriate fields. These credentials are provided by your proxy provider. If you are unsure, contact your proxy provider or network administrator for assistance.
6. Save the settings and apply the changes.

After completing these steps, your application or system should use the provided username and password to authenticate when connecting through the proxy.