use oauth_credentials::Credentials;

use oauth_credentials::Token;

        client: &Credentials<C>,
        token: &Credentials<T>,

        token: &Token<C, T>,

        let req = prepare_request(
            &Self::METHOD,
            Self::URI,
            self,
            client.as_ref(),
            token.as_ref(),
        );

        let req = prepare_request(&Self::METHOD, Self::URI, self, token.as_ref());

    client: Credentials<&str>,
    token: Credentials<&str>,

    token: Token<&str, &str>,

    let mut oauth = oauth::Builder::new(client, oauth::HmacSha1);
    oauth.token(token);

    let mut oauth = oauth::Builder::new(token.client(), oauth::HmacSha1);
    oauth.token(token.token());