Android Studio中使用Firebase创建新用户失败求助

我没有收到任何报错信息，代码是从官方文档及教程复制而来，但点击注册按钮后显示注册失败。

已完成以下操作：

• 在Manifest文件中添加了权限
• 在Firebase控制台开启了邮箱/密码认证
• 按照规范流程完成注册配置

我希望能成功注册并在Firebase控制台查看用户，同时能在Firebase上查看注册的邮箱和密码。

代码如下： #

package com.example.auth;

import static androidx.constraintlayout.widget.StateSet.TAG;

import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

public class MainActivity extends AppCompatActivity {
EditText email,password,confirmpasswordreg;
Button register;
TextView alreadylogin;
FirebaseAuth mauth;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        email=findViewById(R.id.editTextTextEmailAddressreg);
        password=findViewById(R.id.passwordregister);
        alreadylogin=findViewById(R.id.textView4reg);
        register=findViewById(R.id.buttonreg);
        confirmpasswordreg=findViewById(R.id.cnfmpassreg);
        mauth=FirebaseAuth.getInstance();                             


        register.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String username=email.getText().toString();
                String passwords=password.getText().toString();
                String confirmpassword=confirmpasswordreg.getText().toString();

                    mauth.createUserWithEmailAndPassword(username,passwords)
                            .addOnCompleteListener(MainActivity.this, new OnCompleteListener<AuthResult>() {
                                @Override
                                public void onComplete(@NonNull Task<AuthResult> task) {
                                    if (task.isSuccessful()) {
                                        // Sign in success, update UI with the signed-in user's information
                                        Log.d(TAG, "createUserWithEmail:success");
                                        FirebaseUser user = mauth.getCurrentUser();
                                        Toast.makeText(MainActivity.this, "sign up success", Toast.LENGTH_SHORT).show();
                                    } else {
                                        // If sign in fails, display a message to the user.
                                        Log.w(TAG, "createUserWithEmail:failure", task.getException());
                                        Toast.makeText(MainActivity.this, "sign up failed", Toast.LENGTH_SHORT).show();

                                    }
                                
                            });
                }
            }
        });


    }
}

内容的提问来源于stack exchange，提问作者Mohommed Habib