how to utilize a static class to wrap configuration values?

I am attempting to retrieve config values with a static class:

public static class Configurator
{
    public static string HashesConnectionString { get; } = Environment.GetEnvironmentVariable("HashesConnectionString");
    public static string SftpUser { get; } = Environment.GetEnvironmentVariable("SftpUser");}

When attempting to retrieve these from a separate class, I am getting a very embarrassing error:

System.TypeInitializationException
  HResult=0x80131534
  Message=The type initializer for 'MyHandler.Configuration.Configurator' threw an exception.
  Source=MyHandler
  StackTrace:
   at MyHandler.Configuration.Configurator.get_HashesConnectionString() in C:\Users\John.S\source\repos\MyHandler\MyHandler\Configuration\Configurator.cs:line 11
   at MyHandler.OnMumboCaseBlobTriggered.RunAsync(CloudBlockBlob blob, String name, TraceWriter log) in C:\Users\John.S\source\repos\MyHandler\MyHandler\Functions\OnMumboCaseBlobTriggered.cs:line 31
   at Microsoft.Azure.WebJobs.Host.Executors.VoidMethodInvoker`2.InvokeAsync(TReflected instance, Object[] arguments)
   at Microsoft.Azure.WebJobs.Host.Executors.FunctionInvoker`2.<InvokeAsync>d__9.MoveNext()

Inner Exception 1:
ArgumentNullException: Value cannot be null.
Parameter name: String

Initially I thought something funny was happening with Environment.GetEnvironmentVariable() but this did not turn out to be the case, when I tested this hypothesis by hardcoding the config values like so:

public static class Configurator
{
   public static string HashesConnectionString {get;} = "my hardcoded value"
}

But the exception persists!

What is wrong with my static class? Am I improperly using this class?

This exception occurs in this example:

public static void RunAsync([BlobTrigger("awesomeBlobber", Connection = "StorageConnectionString")] CloudBlockBlob blob, string name, TraceWriter log)
{
               var connString = Configuration.Configurator.HashesConnectionString;

}