GetRepository gets a repository by its ID.

AUTH_REPOSITORY is the key to be used when creating the repositories hashmap.

Constant CLIENT_REPOSITORY is used to uniquely identify the client repository.

Constant PRODUCT_REPOSITORY is used to uniquely identify the product repository.

Database is the Database manager for connections and repository instancies.

AuthRepository defines the behaviors to be used by a AuthRepository implementation.

ClientRepository defines the methods for working with client data in the database.

DatabaseConnector defines a database connector handler.

ProductRepository defines the methods for working with product data in the database.

Repositories is a list of repositories.

RepositoryID is the key to use for the repositories hashmap.