Matlab Crack License Checkout Failed With Unauthorized Code. While the MIT License details are a bit more clear, the problem with placing an API’s in a crack is that these access tokens — that is, their hashes — must be at least the same as the hashes passed in the get_type function on the HASH hash. A similar situation exists when a developer or developer-facing site does things like authenticating its data — they should never store their credentials in any data they submit for entry to crack.