VaporJWT JWT implementation for Vapor Resources / Acknowledgements http://davidederosa.com/basic-blockchain-programming/elliptic-curve-keys/ http://davidederosa.com/basic-blockchain-programming/elliptic-curve-digital-signatures/ https://tools.ietf.org/html/draft-ietf-oauth-json-web-token-25 https://kjur.github.io/jsrsasign/sample-ecdsa.html