从 Firebase 实时数据库中检索特定数据

Question

请帮助我想从 Firebase 实时数据库中检索特定数据我有 2 个用户教授和学生，我想使用该数据进行验证。

firebaseAuth.signInWithEmailAndPassword(email,pass).addOnCompleteListener(new OnCompleteListener<AuthResult>() {

            @Override

            public void onComplete(@NonNull Task<AuthResult> task) {

                progressDialog.dismiss();

                if(task.isSuccessful()){

                    //The task is successful || Task Login

                    Toast.makeText(getApplicationContext(),"Successfully Login",Toast.LENGTH_LONG).show();

                        // If the users is professor but if it is student go to userStudent.class

                        finish();

                        startActivity(new Intent(getApplicationContext(),userProf.class));