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Returns the list containing the username and password for the given realm and url when authentication is required by the server. This function is usually called internally by request . This method becomes useful when creating a subclass of LWP::UserAgent with its own version of get_basic_credentials . From there, you can rewrite get_basic_credentials to do more flexible things, like asking the user for the account information, or referring to authentication information in a file. All you need to do is return a list, where the first element is a username and the second element is a password.