Sign In with Email and Password is enabled by default on all projects.

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Sign Up

To Sign Up a new user, use signUp with a valid email and password. 
await nhost.auth.signUp({
  email: 'joe@example.com',
  password: 'secret-password'
})
When email verification is enabled, a newly registered user will receive an email with a link they must follow in order to verify the email address

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Sign In

After a user is registered, and optionally verified, it is able to Sign In. 
await nhost.auth.signIn({
  email: 'joe@example.com',
  password: 'secret-password'
})

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Email Verification

By default, newly registered users will receive an email with a verification link they must follow before they can Sign In. To change this setting, navigate to Settings -> Sign-In Methods -> Email and Password and set Require Verified Emails. It is possible to manually send the verification email to a user with sendVerificationEmail(). 
await nhost.auth.sendVerificationEmail({
  email: 'joe@example.com',
  password: 'secret-password'
})
It is possible to customize these automatic emails, learn how to here