class MissingEnvVarsError extends Errorimport { MissingEnvVarsError } from "https://dotland.deno.dev/std@0.221.0/dotenv/mod.ts"; Error thrown in load and loadSync when required environment variables are missing. ConstructorsnewMissingEnvVarsError(message: string, missing: string[])Constructs a new instance. Propertiesmissing: string[]The keys of the missing environment variables.