ConnectToDb use emtpy string for hardcoded port.

GetTokenFromDB is delegated to retrieve the token from Redis.

GetValueFromDB is delegated to check if a key is alredy inserted and return the value in the dest variable in signature.

InsertTokenIntoDB set the two value into the Databased pointed from the client.

InsertValueIntoDB is delegated to save a general structure into redis.

RemoveValueFromDB is delegated to check if a key is alredy inserted and return the value.