signInWithPassword with flutter throwing AuthException with code = null contrary to documentation

/// Error code associated with the error. Most errors coming from
/// HTTP responses will have a code, though some errors that occur
/// before a response is received will not have one present.
/// In that case [statusCode] will also be null.
///
/// Find the full list of error codes in our documentation.
/// https://supabase.com/docs/reference/dart/auth-error-codes
final String? code;

/// Error code associated with the error. Most errors coming from
/// HTTP responses will have a code, though some errors that occur
/// before a response is received will not have one present.
/// In that case [statusCode] will also be null.
///
/// Find the full list of error codes in our documentation.
/// https://supabase.com/docs/reference/dart/auth-error-codes
final String? code;