Making ways only certain players can enter in bedrock & Java secret doors

Imagine you just made a base. You tell your friends, next thing you know. All your treasure is gone! You make a more secure one, but you can’t get in yourself! Then imagine this, you make a base. Using a special door/trapdoor only you can enter. They can’t get in! I love the way VANILLA Minecraft is. I don’t want keycards or anything like that but SomeThing that is hard to break, and maybe if you use a secret item it’ll open? Nothing like face scanning or- no no no! Treasure saved!