Pass custom options to UniversalLogin (filled-in referal field)

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You can use authParamsMap like this:


    webAuth.authorize({
      authParamsMap: {'referrerId': 'abc123'}
    });

and refer to it via config.extraParam.referrerId in the Universal Login Page (adding it as hidden additional field value) , or via context.request.query.auth_params_map.referrer_id in a Rule. The latter probably makes more sense.
You can then store the referrerId in the user’s metadata via a rule.

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