You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: _initiate_auth_output.rs
    path of file: ./repos/aws-sdk-rust/sdk/cognitoidentityprovider/src/operation/initiate_auth
    
    the code of the file until where you have to start completion: // Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

/// <p>Initiates the authentication response.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq)]
pub struct InitiateAuthOutput {
    /// <p>The name of the challenge that you're responding to with this call. This name is returned in the <code>InitiateAuth</
    
    fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
        let mut formatter = f.debug_struct("InitiateAuthOutputBuilder");
        formatter.field("challenge_name", &self.challenge_name);
        formatter.field("session", &"*** Sensitive Data Redacted ***");
        formatter.field("challenge_parameters", &self.challenge_parameters);
        formatter.field("authentication_result", &self.authentication_result);
        formatter.field("_request_id", &self._request_id);
        formatter.finish()
    }