How to use the @loopback/authentication.registerAuthenticationStrategy function in @loopback/authentication

});

    this.setUpBindings();

    // Bind authentication component related elements
    this.component(AuthenticationComponent);
    this.component(AuthorizationComponent);

    // authorization
    this.bind('casbin.enforcer').toDynamicValue(createEnforcer);
    this.bind('authorizationProviders.casbin-provider')
      .toProvider(CasbinAuthorizationProvider)
      .tag(AuthorizationTags.AUTHORIZER);

    // authentication
    registerAuthenticationStrategy(this, JWTAuthenticationStrategy);

    // Set up the custom sequence
    this.sequence(MyAuthenticationSequence);

    // Set up default home page
    this.static('/', path.join(__dirname, '../public'));

    // Customize @loopback/rest-explorer configuration here
    this.bind(RestExplorerBindings.CONFIG).to({
      path: '/explorer',
    });
    this.component(RestExplorerComponent);

    this.projectRoot = __dirname;
    // Customize @loopback/boot Booter Conventions here
    this.bootOptions = {

constructor(options: ApplicationConfig = {}) {
    super(options);

    //add
    // Bind authentication component related elements
    this.component(AuthenticationComponent);
    // Bind JWT & permission authentication strategy related elements
    registerAuthenticationStrategy(this, JWTStrategy);
    this.bind(MyAuthBindings.TOKEN_SERVICE).toClass(JWTService);
    this.bind(MyAuthBindings.USER_PERMISSIONS).toProvider(UserPermissionsProvider);
    // Set up the custom sequence
    this.sequence(MySequence);

    // Set up default home page
    this.static('/', path.join(__dirname, '../public'));

    // Customize @loopback/rest-explorer configuration here
    this.bind(RestExplorerBindings.CONFIG).to({
      path: '/explorer',
    });
    this.component(RestExplorerComponent);

    this.projectRoot = __dirname;
    // Customize @loopback/boot Booter Conventions here