message: Add some safety rails :D
diff: @@ -598,7 +598,7 @@ pub fn registry_login(
  .read_line(&mut line)
  .chain_err(|| "failed to read stdin")
  .map_err(failure::Error::from)?;
  - line.trim().to_string()
  + line.replace("cargo login", "").trim().to_string();
  }
  };
  