To rob the Casino Vault in Jailbreak, you need to enter a code that will open the door. The code is located on the wall or behind the table in the lounge area of the Casino. The code is random for each game, so it can be found in different locations. However, there are several videos and guides available that show the possible locations of the code. It is important to note that the codes may change over time, so it is recommended to check for updated information.