How to use the @loopback/context.inject function in @loopback/context

constructor(
    @inject(CoreBindings.APPLICATION_INSTANCE)
    public app: Application,
    @inject(BootBindings.PROJECT_ROOT) projectRoot: string,
    @config()
    public interceptorConfig: ArtifactOptions = {},
  ) {
    super(
      projectRoot,
      // Set InterceptorProvider Booter Options if passed in via bootConfig
      Object.assign({}, InterceptorProviderDefaults, interceptorConfig),
    );
  }

constructor(
    @inject(USER_REPO)
    private userRepository: UserRepository,
    @inject(AuthenticationBindings.USER_PROFILE_FACTORY)
    public userProfileFactory: UserProfileFactory,
  ) {}

constructor(
        @inject(SequenceActions.FIND_ROUTE) protected findRoute: FindRoute,
        @inject(SequenceActions.PARSE_PARAMS)
        protected parseParams: ParseParams,
        @inject(SequenceActions.INVOKE_METHOD) protected invoke: InvokeMethod,
        @inject(SequenceActions.SEND) protected send: Send,
        @inject(SequenceActions.REJECT) protected reject: Reject,
        @inject(EXAMPLE_LOG_BINDINGS.LOG_ACTION) protected logger: LogFn,
      ) {}

constructor(
    @inject(SequenceActions.FIND_ROUTE) protected findRoute: FindRoute,
    @inject(SequenceActions.PARSE_PARAMS) protected parseParams: ParseParams,
    @inject(SequenceActions.INVOKE_METHOD) protected invoke: InvokeMethod,
    @inject(SequenceActions.SEND) public send: Send,
    @inject(SequenceActions.REJECT) public reject: Reject,
    //add
    @inject(AuthenticationBindings.AUTH_ACTION)
    protected authenticateRequest: AuthenticateFn,
  ) {}

export function extensions(extensionPointName?: string) {
  return inject('', {decorator: '@extensions'}, (ctx, injection, session) => {
    extensionPointName =
      extensionPointName ??
      inferExtensionPointName(injection.target, session.currentBinding);

    const bindingFilter = extensionFilter(extensionPointName);
    return createViewGetter(
      ctx,
      bindingFilter,
      injection.metadata.bindingComparator,
      session,
    );
  });
}

constructor(
    @inject(RestBindings.CONFIG, {optional: true})
    restConfig: RestServerConfig = {},
    @inject(RestExplorerBindings.CONFIG, {optional: true})
    explorerConfig: RestExplorerConfig = {},
    @inject(RestBindings.BASE_PATH) private serverBasePath: string,
    @inject(RestBindings.SERVER) private restServer: RestServer,
    @inject(RestBindings.Http.CONTEXT) private requestContext: RequestContext,
  ) {
    this.useSelfHostedSpec = explorerConfig.useSelfHostedSpec !== false;
    this.openApiSpecUrl = this.getOpenApiSpecUrl(restConfig);
  }

  constructor(@inject(RestBindings.Http.REQUEST) private req: Request) {}

constructor(
    @inject(RestBindings.CONFIG, {optional: true})
    restConfig: RestServerConfig = {},
    @inject(RestExplorerBindings.CONFIG, {optional: true})
    explorerConfig: RestExplorerConfig = {},
    @inject(RestBindings.BASE_PATH) private serverBasePath: string,
    @inject(RestBindings.SERVER) private restServer: RestServer,
    @inject(RestBindings.Http.CONTEXT) private requestContext: RequestContext,
  ) {
    this.useSelfHostedSpec = explorerConfig.useSelfHostedSpec !== false;
    this.openApiSpecUrl = this.getOpenApiSpecUrl(restConfig);
  }

constructor(
    @inject(CoreBindings.APPLICATION_INSTANCE) public app: Application,
    @inject(BootBindings.PROJECT_ROOT) private projectRoot: string,
  ) {}

  constructor(@inject(RestBindings.Http.REQUEST) private req: Request) {}