Function discard 

pub async fn discard<R>(reader: &mut R, n: u64) -> Result<(), Error>
where
    R: AsyncRead + Unpin,

Read and discard exactly n bytes from reader.

Equivalent to reader.read_exact(&mut vec![0u8; n]) but does not allocate a buffer sized to n; it pipes the bytes through [tokio::io::sink] via a take adaptor, reusing a small internal scratch buffer instead.

Returns an UnexpectedEof error if the reader yields fewer than n bytes before EOF.