It is HIGHLY recommended that players secure their devices in which they play their games on! This helps prevents unauthorized users from making any changes on their account that cannot be reversed such as use of currency to buy cards, upgrading cards, etc.
This also includes not sharing your account with others! Not only does this help prevent players from making changes you did not intend to happen, it also means you will not have unauthorized purchases that charge your app store account or credit cards.
We have heard it all from players who neglect to take caution;
- My young family member purchased a bunch of things! I want a refund!
- Someone went onto my account and jokingly used my currency!
- I let my little brother use my account, but he cheated so now I am banned!
Sorry! These are NOT valid excuses and will not be provided any leniency! This is your 1 and only warning!