setApiToken method
Implementation
setApiToken(String apiToken) async {
bearerToken = apiToken;
bearerTokenExpirationDate = Constant.format_yyyyMMdd.format(DateTime.now().add(const Duration(days: 90)));
sharedPreferences.setString(Constant.API_TOKEN, apiToken);
sharedPreferences.setString(Constant.API_TOKEN_EXPIRATION_DATE, bearerTokenExpirationDate);
updateHeader();
}