Create registrant

Register an attendee for a scheduled webinar. The response contains the registrantKey and join URL for the registrant. An email will be sent to the registrant unless the organizer turns off the confirmation email setting from the GoToWebinar website. Please note that you must provide all required fields including custom fields defined during the webinar creation. Use the API call 'Get registration fields' to get a list of all fields, if they are required, and their possible values. At this time there are two versions of the 'Create Registrant' call. The first version only accepts firstName, lastName, and email and ignores all other fields. If you have custom fields or want to capture additional information this version won't work for you. The second version allows you to pass all required and optional fields, including custom fields defined when creating the webinar. To use the second version you must pass the header value 'Accept: application/vnd.citrix.g2wapi-v1.1+json' instead of 'Accept: application/json'. Leaving this header out results in the first version of the API call.