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: auth_token_impl.rs
    path of file: ./repos/sentry-cli/src/utils/auth_token
    
    the code of the file until where you have to start completion: //! Defines the AuthToken type, which stores a Sentry auth token.

use super::AuthTokenPayload;
use super::{OrgAuthToken, UserAuthTo
    
    fn as_str(&self) -> &str {
        match self {
            AuthTokenInner::Org(ref org_auth_token) => org_auth_token.as_str(),
            AuthTokenInner::User(user_auth_token) => user_auth_token.as_str(),
            AuthTokenInner::Unknown(auth_string) => auth_string,
        }
    }