Tweet image lambda

This code is to tweet an image and text from an AWS lambda. I used it to hook up my AWS IoT button to a twitter account.

Installation instructions:

1. Download and install .NET Core.
2. Create a twitter account, create an app for the account, and get the 4 credentials keys of the app.
3. Create a config.json file in the project folder with the required attributes (see example_config.json in the project).
4. Open a command line window and move to the project directory, run dotnet restore and dotnet publish in the directory.
5. zip the resulting publish folder and load it into your Lambda.