How to open the underground safe to the island behind gta5?

Go to the island behind gta5 and open the underground safe with a password. Gta5 online robbery map of perico Island. When we enter the vault, we can see a safe. To open the safe, we need to enter the password. During the robbery, Pavel sent the password of the safe to his mobile phone by SMS. Every time the password of the safe is random, when we arrive at the door of the vault, we can receive the password of the safe in a short message.