code: func (ssa *SQLStorageAuthority) GetValidAuthorizations(
  	ctx context.Context,
  	registrationID int64,
  	names []string,
  	now time.Time) (map[string]*core.Authorization, error) {
  	return ssa.getAuthorizations(
  		ctx,
  		authorizationTable,
  		string(core.StatusValid),
  		registrationID,
  		names,
  		now,
  		false)
  }
docs: // GetValidAuthorizations returns the latest authorization object for all
  // domain names from the parameters that the account has authorizations for.