我有一些关于我学校的数据，我想列出特定年龄的学生和老师，我有一个这样的例子 这是我们的数据：-
[{"groupnumber":1,"groupid":1737983,"users":[{"id":2949,"user_name":"vishal kumaar","role":"classmate","bonus":"9","image":"www.example.com/myusers-8601.png","age":"25","classname":"9th","classmonitor":0,"teacher":0},{"id":2940,"user_name":"ravi kumar","role":"classmate","bonus":"9","image":"www.example.com/myusers-8601.png","age":"23","classname":"9th","classmonitor":0,"teacher":0},{"id":2948,"user_name":"raman","role":"classmate","bonus":"9","image":"www.example.com/myusers-8601.png","age":"25","classname":"9th","classmonitor":0,"teacher":1}]}
现在我想找出年龄为23岁且需要教师的第二个值为1的学生的用户名，那用户名是什么 我尝试了很多方法，但我找不到