%% You should probably cite rfc8908 instead of this I-D.
@techreport{ietf-capport-api-02,
    number =    {draft-ietf-capport-api-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-capport-api/02/},
    author =    {Tommy Pauly and Darshak Thakore},
    title =     {{Captive Portal API}},
    pagetotal = 9,
    year =      2019,
    month =     mar,
    day =       11,
    abstract =  {This document describes an HTTP API that allows clients to interact with a Captive Portal system.},
}