Function to Add a new Cryptocurrency.

Function to Build Database, Create Tables and Data Seeding.

Function to Open the Database Connection and store it in the Klever Struct.

Function to Subtract a Vote to Given Crypto.

Function to Get All Cryptos according to given parameter.

//Function to return a CRYPTO by ID.

Function to Delete a Crypto by its ID.

Function to Add a Vote to Given Crypto.

Struct to store the Database connection to share it across the application.