Environment variables

- [Instructor] Visual Studio App Center builds have…a concept of environment variables.…These can be used for a variety of reasons.…For example, it is common not to want to store passwords…or API keys in public repositories.…These can be setup using environment variables.…Anything you may think needs to be passed to a build script…as a parameter can be set up as an environment variable…instead, we're going to do this for our QA build.…So we're going to switch to the QA branch (mumbles).…

And make sure the active branch selector is next…to the QA branch.…Next we'll go to Visual Studio for Mac.…In Visual Studio for Mac, we are going to set up a constant…to contain a Visual Studio App Center API key that we will…use in a later chapter.…Since we don't want to check (mumbles) control we won't…actually hard code the API key into our file.…In our share project we're going to go to File and New File…and we're going to create an empty class…and call it constants.…

First going to remove the constructor and we're going to…