Is it permissible for a guard to interrupt prayer to open the door for residents who are knocking?

If the worshiper is at the end of his prayer, he should complete it quickly and open the door, as long as his delay has no adverse effect. However, if he is at the beginning of his prayer, and delaying the person knocking would cause him harm in his work, then it is permissible for him to interrupt the prayer and open the door due to this necessity.