I have to implement HD Wallet and issue a deposit address to the user.
Is there a best practice for storing master private keys and mnemonic?
I would appreciate it if you could also tell me how to save the master private key and mnemonic, and how to save the user's private key (child key).
The method I am considering is to use AWS' Secret Manage Store.
Please let me know if there is another better alternative.
I know there are several similar questions, but I didn't have a satisfactory answer because I'm building the form of Cefi, not Dapp.