如何根据Firebase信息重定向到其他页面

Firebase结构

对于我的项目，我想允许用户单击带有Firebase的按钮(使用电子邮件和密码登录)后，根据其身份(例如:买方，卖方)登录各自的主页.我不确定完成的方式.

For my project, I would like to allow users to login to respective homepages based on their identity (eg: Buyer,Seller) after clicking a button with the firebase sign in with email and password method. I am unsure about the way to get it done.

这是我尝试过的方法，我被定向到买卖双方的SellerHomepage.

Here's what I tried and I was directed to SellerHomepage for both Buyers and Sellers.

 fAuth.signInWithEmailAndPassword(email,password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
              @Override
              public void onComplete(@NonNull Task<AuthResult> task) {
                  if (task.isSuccessful()) {
                      db = FirebaseDatabase.getInstance().getReference("users");
                      db.addValueEventListener(new ValueEventListener() {
                          @Override
                          public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                              for (DataSnapshot ds : dataSnapshot.getChildren() ) {
                                  String userType = ds.child("type").getValue(String.class);
                                  if (userType.equals("Buyer")) {
                                      startActivity(new Intent(MainActivity.this,BuyerHomepage.class));
                                  }
                                  else if(userType.equals("Seller")) {
                                      startActivity(new Intent(MainActivity.this,SellerHomepage.class));
                                  }
                              }
                          }

                          @Override
                          public void onCancelled(@NonNull DatabaseError databaseError) {

                          }
                      });
                  }
                  else {
                      Toast.makeText(MainActivity.this,"Error !" +task.getException().getMessage(),Toast.LENGTH_SHORT).show();
                  }
              }
          });