AWS Lambda Function for Access Control and Encryption Untrusted Third Party

## Overview

As a video provider, I need to make sure that I only provide video access to authorized people. As a client, I need a service that is always on, that I can request encrypted video.

### Acceptance

- Deployed and tested lambda function that
- can receive requests from client (via AWS API Gateway),
- verify signature of client
- store things to Dynamo DB,
- receive events from DynamoDB

## Tasks

- integrate in implementation of ECDSA for checking client signature
- Use Infura to access smart contract with Ethereum Addresses - use this to get public key
- Setup API endpoints