ConnectDB establishes the global connection to a database.

MySQLDSNConfig is a simple util function for creating a mysql.Config with custom connection options.

DBConnectino is a global connection to a database, through which application logic interacts with database.

UserDBEntity is a model for how users are represented in database.

UserModel represents a model of an user, which is used in application logic.

DBConnection represents a layer between the database and the application logic.