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: _sign_up_input.rs
    path of file: ./repos/aws-sdk-rust/sdk/cognitoidentityprovider/src/operation/sign_up
    
    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>Represents the request to register a user.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq)]
pub struct SignUpInput {
    /// <p>The ID of the client associated with the user pool.</p>
    pub client_id: ::std::option::Option<::std::string::String>,
    /// <p>A keyed-hash message authentication code (HMAC) calculated using the secret key of a user pool client and username plus the client ID in the message.</p>

    
    pub fn build(self) -> ::std::result::Result<crate::operation::sign_up::SignUpInput, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::operation::sign_up::SignUpInput {
            client_id: self.client_id,
            secret_hash: self.secret_hash,
            username: self.username,
            password: self.password,
            user_attributes: self.user_attributes,
            validation_data: self.validation_data,
            analytics_metadata: self.analytics_metadata,
            user_context_data: self.user_context_data,
            client_metadata: self.client_metadata,
        })
    }