Aderlo Metaverse

In the contract `AderloCashbackCoin` the role `_owner` has authority over the functions shown in the diagram below. Any compromise to the `_owner` account may allow the hacker to take advantage of this authority and pause or unpause the contract or mint new ACC supply to addresses he owns or controls.  --- In the contract `ACCTokenSale` the role `_owner` has authority over the functions shown in the diagram below. Any compromise to the `_owner` account may allow the hacker to take advantage of this authority and call `sendOutsidePurchase()`, withdraw funds from this contract to malicious addresses he owns or controls and change the value of `tokensPerETH`.  --- In the contract `AderloNFT` the role `_owner` has authority over the functions shown in the diagram below. Any compromise to the `_owner` account may allow the hacker to take advantage of this authority and mint new tokens or call the `burn()` function. 

The contract has unlocked compiler version. An unlocked compiler version in the source code of the contract permits the user to compile it at or above a particular version. This, in turn, leads to differences in the generated bytecode between compilations due to differing compiler version numbers. This can lead to an ambiguity when debugging as compiler specific bugs may occur in the codebase that would be hard to identify over a span of multiple compiler versions rather than a specific one.

`numberOfWithdrawals` is declared and initialized to zero but never used.

`msg.sender` is used instead of `_msgSender()` from `ContextUpgradeable`.