NewAuthController creates a new AuthController.

NewBookController creates a new BookController.

NewGroupAuthController creates a new GroupAuthController.

NewLibraryController creates a new LibraryController.

NewUsrController creates a new UsrController.

NewUsrGroupController creates a new UsrGroupController.

AuthController is the Auth controller type for route binding.

BookController is the book controller type for route binding.

GroupAuthController is the GroupAuth controller type for route binding.

LibraryController is the library controller type for route binding.

Token is the jwt return type.

UsrController - the usr controller type.

UsrGroupController is the usrGroup controller type for route binding.