Как перенаправить пользователя на конкретную деятельность в Cloud Firestore?

При регистрации учетной записи с помощью Firebase auth я сохранял электронные письма в 2 категориях Teacher и Student. Я добавляю электронные письма в Firestore 2 разных категории Учитель и Ученик с email и password. Когда я вхожу в систему, я хочу проверить, принадлежит ли электронная почта к какой категории (учитель или ученик), как я могу это сделать, я попробовал запрос к firestore isequalsto, но он не различался.

Вот моя база данных Учитель Студент

Любое другое возможное решение?

вот мой код для входа в систему

package com.example.dell.step;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.firestore.CollectionReference;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.QuerySnapshot;

public class LoginActivity extends AppCompatActivity {


    private Button mRegbtn;
    private Button mloginbtn;
    private EditText mEmail;
    private EditText mPassword;

    private Toolbar mToolbar;

    private FirebaseAuth mAuth;

    private ProgressDialog mLoginDialog;
    private FirebaseFirestore firebaseFirestore;
    private CollectionReference collectionReference_I;
    private CollectionReference collectionReference_S;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);


        mAuth = FirebaseAuth.getInstance();

        //Progress Dialog

        mLoginDialog = new ProgressDialog(this);

        //FOr Toolbar

        mToolbar = findViewById(R.id.login_toolbar);
        setSupportActionBar(mToolbar);
        getSupportActionBar().setTitle("Login Account");


        mloginbtn = findViewById(R.id.login_btn);
        mEmail = findViewById(R.id.login_email);
        mPassword = findViewById(R.id.login_password);

        mRegbtn = findViewById(R.id.login_reg_btn);

        firebaseFirestore = FirebaseFirestore.getInstance();

        mRegbtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent regIntent = new Intent(LoginActivity.this, RegisterActivity.class);
                startActivity(regIntent);
                finish();

            }
        });


        mloginbtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String email = mEmail.getText().toString();
                String password = mPassword.getText().toString();

                if (!TextUtils.isEmpty(email) && !TextUtils.isEmpty(password)) {
                    mLoginDialog.setTitle("Login User");
                    mLoginDialog.setMessage("Please wait while we login to your account :)");
                    //it stops cancel Dialog when user touch on screen
                    mLoginDialog.setCanceledOnTouchOutside(false);
                    mLoginDialog.show();

                    login_user(email, password);
                }
            }
        });


    }

    private void login_user(final String email, final String password) {

        collectionReference_I = firebaseFirestore.collection("Teacher");
        collectionReference_S = firebaseFirestore.collection("Student");

        collectionReference_I.whereEqualTo("teacher_email", email).get().addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() {
            @Override
            public void onSuccess(QuerySnapshot documentSnapshots) {

                mAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {


                        if (task.isSuccessful()) {

                            //Dismiss the progress Dialog
                            mLoginDialog.dismiss();


                            //user is registered
                            Toast.makeText(LoginActivity.this, "Welcome to Teacher Account", Toast.LENGTH_SHORT).show();
                            Intent mainIntent = new Intent(LoginActivity.this, MainActivity.class);
                            startActivity(mainIntent);
                            finish();


                        } else {

                            mLoginDialog.hide();

                            //if user is not registered
                            Toast.makeText(LoginActivity.this, "Cannot Log in Please check the form and try again!", Toast.LENGTH_LONG).show();

                        }

                    }
                });


            }
        });

        collectionReference_S.whereEqualTo("Student_email", email).get().addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() {
            @Override
            public void onSuccess(QuerySnapshot documentSnapshots) {

                mAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {


                        if (task.isSuccessful()) {

                            //Dismiss the progress Dialog
                            mLoginDialog.dismiss();


                            //user is registered
                            Toast.makeText(LoginActivity.this, "Welcome to Student Account", Toast.LENGTH_SHORT).show();
                            Intent mainIntent = new Intent(LoginActivity.this, StudentMain.class);
                            startActivity(mainIntent);
                            finish();


                        } else {

                            mLoginDialog.hide();

                            //if user is not registered
                            Toast.makeText(LoginActivity.this, "Cannot Log in Please check the form and try again!", Toast.LENGTH_LONG).show();

                        }

                    }
                });


            }
        });


    }
}