get https://gateway.niumtravel.com/commons/authorisations/
Returns a list of authorisations for a virtual card for a specified period. Authorisations are returned in groups called pages. You must specify how many records will be included in each page (up to 100) and then specify the page you want Nium to return. In order to determine the number of pages, you need to use 'Get Virtual Card Authorisations Count' first to get an overall count of total authorisations for the period.