toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
  if (authCode != null) 'authCode': authCode!,
  if (oauthTokenData != null) 'oauthTokenData': oauthTokenData!,
  if (redirectUri != null) 'redirectUri': redirectUri!,
  if (scopes != null) 'scopes': scopes!,
};