env

type Env interface {
	// Var constructs a string by joining the given string slices with underscores and converting to uppercase.
	Var(...string) string
	// LookupEnv retrieves the value of an environment variable with the given key.
	LookupEnv(string) (string, bool)
	// SetEnv sets an environment variable with the given key and value.
	SetEnv(string, string) error
	// GetEnv retrieves the value of an environment variable with the given key.
	GetEnv(string) string
}