Open the Developer Tool of your browser, navigate to the console tab and paste the btoa('username:password') (replace username & password with the actual values), and press enter. Next, copy the text in the following line (without the double quotes). That’s the Base64 encoded of your username and password. Alternatively, you could google 'Base64 generator' and use one of the websites to do it, but that’s not safe, and we don’t recommend it at all.