public void Test_GetWorkspace_ThrowsAnException_WhenTheWorkspaceIdIsNotValid()
 {
     try
     {
         _structurizrClient = new StructurizrClient("key", "secret");
         _structurizrClient.GetWorkspaceAsync(0).Wait();
         throw new TestFailedException();
     }
     catch (AggregateException iae)
     {
         Assert.Equal("The workspace ID must be a positive integer.", iae.InnerException.Message);
     }
 }