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Supabase Backend as a Service · 课时

使用电子邮件和密码注册用户

实现标准的电子邮件和密码身份验证，包括用户注册、登录和密码重置功能。

使用电子邮件和密码注册用户 是 CoddyKit 上的免费 Supabase Backend as a Service 课时。 这是第 1 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Supabase Backend as a Service 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Supabase Backend as a Service 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Email/Password Auth Basics

Welcome to user authentication with Supabase! We'll start with the most common method: email and password.

This method allows users to create an account using their email and a chosen password, and then sign in with those credentials.

Supabase Auth Explained

Supabase provides a complete authentication system out-of-the-box. It handles:

  • User registration and login
  • Password hashing and security
  • Session management
  • Email confirmations and password resets

All of this is managed through simple client-side methods.

Initialize Supabase Client

Before we can register or log in users, we need to set up the Supabase client. This client will be our bridge to all Supabase services, including authentication.

You'll need your project's URL and anon (public) key, which you can find in your Supabase dashboard settings.

import { createClient } from '@supabase/supabase-js'

const SUPABASE_URL = 'YOUR_SUPABASE_URL'
const SUPABASE_ANON_KEY = 'YOUR_SUPABASE_ANON_KEY'

const supabase = createClient(SUPABASE_URL, SUPABASE_ANON_KEY)

console.log('Supabase client initialized!')

Registering New Users

To let users create an account, we use the signUp method. This method takes an email and password, and optionally other user metadata.

Supabase handles the secure storage of the password and typically sends a confirmation email to the user.

async function registerUser(email, password) {
  const { data, error } = await supabase.auth.signUp({
    email: email,
    password: password
  })

  if (error) {
    console.error('Sign up error:', error.message)
  } else {
    console.log('User signed up successfully:', data.user.email)
    console.log('Check your email for a confirmation link!')
  }
}

Try User Sign-Up

Let's put the signUp method into a runnable example. This code simulates a new user registration.

In a real app, you'd get the email and password from a form.

import { createClient } from '@supabase/supabase-js'

const SUPABASE_URL = 'https://abcde12345.supabase.co'
const SUPABASE_ANON_KEY = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6ImFiY2RlMTIzNDUiLCJyb2xlIjoiYW5vbiIsImlhdCI6MTY3ODkwMTIzNCwiZXhwIjoxOTk0NTY3ODkwfQ.YOUR_SECRET_KEY'

const supabase = createClient(SUPABASE_URL, SUPABASE_ANON_KEY)

async function trySignUp() {
  const testEmail = `testuser${Date.now()}@example.com`
  const testPassword = 'securepassword123'

  console.log(`Attempting to sign up ${testEmail}`)
  const { data, error } = await supabase.auth.signUp({
    email: testEmail,
    password: testPassword
  })

  if (error) {
    console.error('Sign up failed:', error.message)
  } else {
    console.log('Sign up successful! User ID:', data.user.id)
    console.log('Confirmation email sent to:', data.user.email)
  }
}

trySignUp()

Email Confirmation Step

After a user signs up, Supabase usually sends a confirmation email. This is a vital security measure to verify email ownership.

  • Users click a link in the email.
  • This link verifies their email address.
  • Their account becomes active and they can then sign in.

You can configure email templates and redirection URLs in your Supabase project settings.

Logging In Existing Users

Once a user has registered and confirmed their email, they can log in using the signInWithPassword method.

This method authenticates the user and returns a session object, allowing them to access protected resources.

async function signInUser(email, password) {
  const { data, error } = await supabase.auth.signInWithPassword({
    email: email,
    password: password
  })

  if (error) {
    console.error('Sign in error:', error.message)
  } else {
    console.log('User signed in successfully:', data.user.email)
    console.log('Session access token:', data.session.access_token)
  }
}

Try User Sign-In

Here's a runnable example of signing in a user. Remember, for this to work, the user must already be registered and their email confirmed.

You would typically store the session token for subsequent authenticated requests.

import { createClient } from '@supabase/supabase-js'

const SUPABASE_URL = 'https://abcde12345.supabase.co'
const SUPABASE_ANON_KEY = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6ImFiY2RlMTIzNDUiLCJyb2xlIjoiYW5vbiIsImlhdCI6MTY3ODkwMTIzNCwiZXhwIjoxOTk0NTY3ODkwfQ.YOUR_SECRET_KEY'

const supabase = createClient(SUPABASE_URL, SUPABASE_ANON_KEY)

async function trySignIn() {
  const existingEmail = 'an_existing_user@example.com' // Replace with a real registered email
  const existingPassword = 'securepassword123' // Replace with that user's password

  console.log(`Attempting to sign in ${existingEmail}`)
  const { data, error } = await supabase.auth.signInWithPassword({
    email: existingEmail,
    password: existingPassword
  })

  if (error) {
    console.error('Sign in failed:', error.message)
  } else {
    console.log('Sign in successful! User ID:', data.user.id)
    console.log('Current session:', data.session)
  }
}

trySignIn()

Initiating Password Resets

What if a user forgets their password? Supabase makes it easy to handle password resets securely using resetPasswordForEmail.

This method sends a special magic link to the user's email, which they can use to set a new password.

async function requestPasswordReset(email) {
  const { data, error } = await supabase.auth.resetPasswordForEmail(email, {
    redirectTo: 'https://example.com/update-password' // User redirected here after clicking link
  })

  if (error) {
    console.error('Password reset request error:', error.message)
  } else {
    console.log('Password reset email sent successfully to:', email)
  }
}

Auth Methods Check

Which Supabase Auth method is used to create a new user account with an email and password?

Email/Password Auth Summary

Great job! You've learned the core of email and password authentication with Supabase:

  • Initializing the Supabase client.
  • Using signUp to register new users.
  • Understanding the email confirmation process.
  • Using signInWithPassword to log in existing users.
  • Initiating password resets with resetPasswordForEmail.

This forms the foundation for secure user management in your applications!

常见问题解答

「使用电子邮件和密码注册用户」课时是免费的吗？

是的 — 「使用电子邮件和密码注册用户」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Supabase Backend as a Service 课程的其余内容，请升级到 CoddyKit PRO。 Supabase Backend as a Service 课程共包含 4 节课。

「使用电子邮件和密码注册用户」这节课中我会学到什么？

实现标准的电子邮件和密码身份验证，包括用户注册、登录和密码重置功能。 你通过在浏览器中直接运行的动手代码来练习 Supabase Backend as a Service，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 Supabase Backend as a Service 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Supabase Backend as a Service 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 1 节课，共 4 节。

「使用电子邮件和密码注册用户」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 Supabase Backend as a Service 课中编写并运行代码吗？

能。每节 Supabase Backend as a Service 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

此课程中的所有课时

  1. 使用电子邮件和密码注册用户
  2. 社交登录（OAuth 提供商）
  3. 管理用户会话与个人资料
  4. 密码重置与魔法链接身份验证
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