增加mongodb配置及查询

src/main/java/com/onekeycall/videotablet/controller/LoginController.java

@@ -91,7 +91,7 @@ public class LoginController {
             return Result.ok().data(Collections.singletonMap("token", tokenPair.toMap()));
         } catch (Exception e) {
             e.printStackTrace();
-            return Result.error().message("登录失败");
+            return Result.error().message("登录失败:密码错误");
         }
     }