如何在Firebase身份验证/Flutter中删除未经验证的电子邮件地址？

Question

注册Firebase身份验证“电子邮件/密码”后，无需验证即可保存电子邮件。我有一份关于Flitter firebase的申请。当有人注册时，我会将他们引导到电子邮件验证页面，并将他们保留在那里，直到他们验证电子邮件。问题是，如果有人使用我的电子邮件并在未经验证的情况下删除应用程序，邮件仍会保留在数据库中。我们如何删除未经验证的电子邮件地址？

Answer 1

您可以通过Firebase Admin SDK删除用户。

您需要一个未经验证的用户列表，或者列出所有用户并进行筛选，或者从您自己存储的某个地方，然后您可以删除未验证的用户。

Answer 2

这非常完美：

const functions = require("firebase-functions");
const admin = require("firebase-admin");

admin.initializeApp();
exports.scheduledFunction = functions.pubsub
  .schedule("every 24 hours")
  .onRun((context) => {
    console.log("This will be run every 24 hours!");
    var users = [];
    var unVerifiedUsers = [];
    const listAllUsers = async (nextPageToken) => {
      // List batch of users, 1000 at a time.
      return admin
        .auth()
        .listUsers(1000, nextPageToken)
        .then((listUsersResult) => {
          listUsersResult.users.forEach((userRecord) => {
            users.push(userRecord);
          });
          if (listUsersResult.pageToken) {
            // List next batch of users.
            listAllUsers(listUsersResult.pageToken);
          }
        })
        .catch((error) => {
          console.log("Error listing users:", error);
        });
    };
    // Start listing users from the beginning, 1000 at a time.
    listAllUsers().then(() => {
      unVerifiedUsers = users
        .filter((user) => !user.emailVerified)
        .map((user) => user.uid);
      admin
        .auth()
        .deleteUsers(unVerifiedUsers)
        .then((deleteUsersResult) => {
          console.log(
            `Successfully deleted ${deleteUsersResult.successCount} users`
          );
          console.log(
            `Failed to delete ${deleteUsersResult.failureCount} users`
          );
          deleteUsersResult.errors.forEach((err) => {
            console.log(err.error.toJSON());
          });
          return true;
        })
        .catch((error) => {
          console.log("Error deleting users:", error);
          return false;
        });
    });
  });

Answer 3

您可以每天运行一个定时云函数，检查未经验证的用户并将其删除。这也意味着您必须使用Admin SDK，而不能在Flutter中完成。您可以使用以下代码创建NodeJS云函数并运行它。

exports.scheduledFunction = functions.pubsub.schedule('every 24 hours').onRun((context) => {
    console.log('This will be run every 24 hours!');
    const users = []
    const listAllUsers = (nextPageToken) => {
        // List batch of users, 1000 at a time.
        return admin.auth().listUsers(1000, nextPageToken).then((listUsersResult) => {
            listUsersResult.users.forEach((userRecord) => {
                users.push(userRecord)
            });
            if (listUsersResult.pageToken) {
                // List next batch of users.
                listAllUsers(listUsersResult.pageToken);
            }
        }).catch((error) => {
            console.log('Error listing users:', error);
        });
    };
    // Start listing users from the beginning, 1000 at a time.
    await listAllUsers();
    const unVerifiedUsers = users.filter((user) => !user.emailVerified).map((user) => user.uid)

    //DELETING USERS
    return admin.auth().deleteUsers(unVerifiedUsers).then((deleteUsersResult) => {
        console.log(`Successfully deleted ${deleteUsersResult.successCount} users`);
        console.log(`Failed to delete ${deleteUsersResult.failureCount} users`);
        deleteUsersResult.errors.forEach((err) => {
            console.log(err.error.toJSON());
        });
        return true
    }).catch((error) => {
        console.log('Error deleting users:', error);
        return false
    });
});