ErrConflict – The request conflicts with another request (perhaps due to using the same idempotent key).

ErrInvalidRequest – The request was unacceptable, often due to missing a required parameter.

ErrRender response error writer.

ErrRequestFailed – The parameters were valid but the request failed.

ErrNotFound – The requested resource doesn't exist.

ErrTooManyRequests – Too many requests hit the API too quickly.

ErrUnauthorized – No valid API token provided.

ErrResponse contains error information.

Handler consists of the DB connection and Routes.