public MarketstackServiceTests() { var apiKey = Environment.GetEnvironmentVariable(apiKeyVariable, EnvironmentVariableTarget.Machine); var options = Options.Create(new MarketstackOptions() { ApiToken = apiKey, MaxRequestsPerSecond = 3, Https = true }); _marketstackService = new MarketstackService(options, NullLogger <MarketstackService> .Instance); }