Function tweetust::oauth::request_token

pub fn request_token<'a, CK, CS, CB>(
    consumer_key: CK, 
    consumer_secret: CS, 
    oauth_callback: CB
) -> RequestTokenRequestBuilder<'a> where
    CK: Into<Cow<'a, str>>,
    CS: Into<Cow<'a, str>>,
    CB: Into<Cow<'a, str>>,