@Operation(summary = "platforms", description = "Get all platforms")
    @GetMapping("/platforms")
    public ResponseEntity<List<PlatformVO>> platforms() {
        return ResponseEntity.success(chatService.platforms());
    }
@Test
    void getAllPlatforms() {

        List<PlatformVO> platforms = new ArrayList<>();
        when(chatService.platforms()).thenReturn(platforms);

        ResponseEntity<List<PlatformVO>> response = chatController.platforms();

        assertEquals(platforms, response.getData());
    }