Firebase auth-无法注册

您好我想添加我的应用程序选项登录并注册帐户 . 我使用firebase auth . 我的Graddle看起来像这样

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "com.example.micha.shoppinglist"
        minSdkVersion 22
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    productFlavors {
    }
}

dependencies {
    compile 'com.google.firebase:firebase-storage:11.8.0'
    compile 'com.google.firebase:firebase-auth:11.8.0'
    compile 'com.google.firebase:firebase-database:11.8.0'
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    compile 'com.android.support:recyclerview-v7:25.3.1'





    // butter knife
    compile 'com.jakewharton:butterknife:8.8.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'


    testCompile 'junit:junit:4.12'

    // room
    compile "android.arch.lifecycle:runtime:1.0.0-alpha1"
    compile "android.arch.lifecycle:extensions:1.0.0-alpha1"
    annotationProcessor "android.arch.lifecycle:compiler:1.0.0-alpha1"

    compile "android.arch.persistence.room:runtime:1.0.0-alpha1"
    annotationProcessor "android.arch.persistence.room:compiler:1.0.0-alpha1"

    // stetho
    compile 'com.facebook.stetho:stetho:1.3.1'

    // For OkHttp3
    dependencies {
        compile 'com.facebook.stetho:stetho-okhttp3:1.3.1'
    }
// For OkHttp
    dependencies {
        compile 'com.facebook.stetho:stetho-okhttp:1.3.1'
    }
// For UrlConnection
    dependencies {
        compile 'com.facebook.stetho:stetho-urlconnection:1.3.1'
    }


}

apply plugin: 'com.google.gms.google-services'

我注册帐户的功能看起来像这样

mAuth = FirebaseAuth.getInstance();

mAuth.createUserWithEmailAndPassword("myemail@op.pl", "P@ssw0rd")
        .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
                    Toast.makeText(context, "Authentication passed.",
                            Toast.LENGTH_SHORT).show();
                    FirebaseUser user = mAuth.getCurrentUser();
                } else {
                    // If sign in fails, display a message to the user.
                    Log.d("Error", task.getException().getMessage());
                    Toast.makeText(context, "Authentication failed.",
                            Toast.LENGTH_SHORT).show();
                }
            }
        });

我启用firebase控制台选项登录/注册电子邮件/密码，我收到此错误

03-31 23：48：46.481 26065-26065 / com.example.micha.shoppinglist D /错误：发生内部错误 . [未配置访问权限 . 之前或已禁用Google Identity Toolkit API尚未在项目781137572465中使用 . 通过访问https://console.developers.google.com/apis/api/identitytoolkit.googleapis.com/overview?project=781137572465启用它，然后重试 . 如果您最近启用了此API，请等待几分钟，以便将操作传播到我们的系统并重试 . ]

我不知道为什么，因为我不想使用谷歌登录表单 . 如果有人能帮助我，我将不胜感激 . :)