message: Fix `clippy::manual_map`
diff: @@ -133,13 +133,11 @@ impl TryFrom<&AuthInfo> for Authentication {
  if let Some(exec) = &auth_info.exec {
  let creds = auth_exec(exec)?;
  let status = creds.status.ok_or(ConfigError::ExecPluginFailed)?;
  - let expiration = match status.expiration_timestamp {
  - Some(ts) => Some(
  - ts.parse::<DateTime<Utc>>()
  - .map_err(ConfigError::MalformedTokenExpirationDate)?,
  - ),
  - None => None,
  - };
  + let expiration = status
  + .expiration_timestamp
  + .map(|ts| ts.parse())
  + .transpose()
  + .map_err(ConfigError::MalformedTokenExpirationDate)?;
  (status.token, expiration)
  } else if let Some(file) = &auth_info.token_file {
  (Some(read_file_to_string(file)?), None)
  