Hash - This accepts a password string and returned the hashed version.

VerifyPassword - This compares an hash and a password string.

PasswordReset - PasswordReset struct that represents the User model.

User - User struct that represents the User model.

Wallet - Wallet struct that represents the Wallet model.

WalletTransaction - WalletTransaction struct that represents the WalletTransaction model, it logs every transaction that occured in a wallet.