I've written a summary of the text in 1 paragraph. Here it is: AutoMapper, a library for .NET, can be used to map one model to another, reducing repetition and tediousness in data mapping. The author uses AutoMapper in an internal Twilio tool but found that creating valid maps required writing tests and letting AutoMapper tell them what was needed to configure. By starting with a test project and following the code example provided, developers can use AutoMapper to create mappings between models while ignoring unmapped properties, allowing for more efficient development and reduced boilerplate code.