By default, the Admin User has the password 5555. In order to change this password, you must first log in as Admin User.
Enter the current password and then the new password 2 times to ensure that you do not make a mistake.
Please remember the new password, because there is no other way to reset it.
Note: If you have created any other User with the ADMIN profile or with all permissions enabled they will have the same access profile as the ADMIN User.