Implement authentication that adheres to both the [API Guidelines](https://weatherstack.wtdawson.info/docs/standards/apis/), the [Security Guidelines](https://weatherstack.wtdawson.info/docs/standards/security/), and [WeatherStack Core External API](https://weatherstack.wtdawson.info/docs/apis/core_external_api/1/) documentation.
Implement authentication that adheres to both the API Guidelines, the Security Guidelines, and WeatherStack Core External API documentation.