用户已经使用在Node中创建的自定义令牌通过Firebase身份验证。我想以类似的方式登录到另一个项目中的第二个数据库，使用管理员SDK。

我找不到任何关于如何专门为第二个数据库创建自定义令牌的信息。不管我使用哪个令牌进行身份验证（在前端），我当然会收到一个“auth/Cust-token-mismatch”火力基地错误，消息是“自定义令牌对应于不同的受众”在我看来，下面的“admin. auth（）.createCustomToken”似乎只为第一个应用程序创建它，第二次也为第一个应用程序创建它。

我找不到任何关于在哪里指定创建令牌的应用程序的信息，例如admin. auth（"辅助"）.createCustomToken…或类似的东西。下面是有问题的代码。提前感谢您的时间。

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//连接到Firebase项目1

var firebaseConfig = {
    databaseURL: 'https://app1.firebaseio.com',
    apiKey: 'key1'
};

var credentials = admin.credential.cert({
    "type": "service_account",
    "project_id": "project_1_id",
    "private_key_id": "private_key_id_1",
    "private_key": "PRIVATE KEY 1",
    "client_email": "...",
    "client_id": "...",
    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    "token_uri": "https://oauth2.googleapis.com/token",
    "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
    "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/..."
});

try {
    admin.initializeApp({
        credential: credentials,
        databaseURL: firebaseConfig.databaseURL
    });
} catch(err) {};

//连接到Firebase项目2

var firebaseConfig2 = {
    apiKey: "apikey",
    authDomain: "...firebaseapp.com",
    databaseURL: "...firebaseio.com",
    projectId: "project_2_id",
    storageBucket: "...appspot.com",
    messagingSenderId: "...",
    appId: "..."
};



var firebaseConfig2Credentials = {
    "type": "service_account",
    "project_id": "...",
    "private_key_id": "...",
    "private_key": "RPIVATE KEY 2",
    "client_email": "...gserviceaccount.com",
    "client_id": "...",
    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    "token_uri": "https://accounts.google.com/o/oauth2/token",
    "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
    "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/..."
};


try {
    admin.initializeApp({
        credential: firebaseConfig2Credentials,
        databaseURL: 'https://...firebaseio.com'
    }, "secondary");
} catch(err) {};

//获取第一个代币

var get_firebase_token = async (o) => new Promise((resolve, reject) => {
    admin.auth().createCustomToken(modules.btoa(o.email), {
        expiresAt: Date.now() + (1000 * 60 * 60 * 24 * 30),
        premiumAccount: true
    }).then(function(token) {
        resolve(token);
    }).catch(function(err) {
        resolve(null);
    });
});

firebaseConfig.token = await get_firebase_token(req.cookies);

//GET SECOND TOKEN-这就是我需要帮助的地方

var get_firebase_token2 = async (o) => new Promise((resolve, reject) => {
    admin.auth().createCustomToken(modules.btoa(o.email), {
        expiresAt: Date.now() + (1000 * 60 * 60 * 24 * 30),
        premiumAccount: true
    }).then(function(token) {
        resolve(token);
    }).catch(function(err) {
        resolve(null);
    });
});

firebaseConfig2.token = await get_firebase_token2(req.cookies);