getAuthToken function

Implementation

String getAuthToken(MapEntry<String, String>? header) {
  final headerValue = header?.value;
  const leadingBearerText = 'bearer ';

  return headerValue != null &&
          headerValue.toLowerCase().startsWith(leadingBearerText)
      ? headerValue.substring(leadingBearerText.length)
      : headerValue ?? '';
}