GoTrue

Elixir client for GoTrue, an authentication service that supports many methods of authentication with a small code footprint.

Email+password logins
Passwordless logins with magic links
OAUTH2 - Google, GitHub, BitBucket, GitLab, Facebook
SAML (not yet implmented by this client)

Documentation

Why?

GoTrue is a way of doing authentication by delagating the work to seperate service. It has a very slim HTTP API, requiring little maintance. It's also a polyglot auth solution.

It was developed by Netlify, but this is being developed against the supabase fork

I think [mix.gen.auth] is a great solution too for serious apps, but it requires a bit more work to setup and adjust. For a small team, or for doing quick experiment, offloading a task like auth improves time to markte.

This also makes it possibile to create a supabase client down the road.

Installation

Add gotrue to your list of dependencies in mix.exs:

def deps do
  [
    {:gotrue, "~> 0.1.0"}
  ]
end

In your config/dev.exs & config/prod.exs, configure settings:

config :gotrue,
  # URL to you GoTrue instance
  base_url: "http://0.0.0.0:9999",

  # secret access token
  access_token: "your-super-secret-operator-token"

Usage

Creating a user account

Several options exist to create an account:

Password based

Pass credentials to GoTrue.sign_up/1, a new account will be created and a JWT access token.

GoTrue.sign_up(%{email: "user@example.com", password: "123456"})

OAUTH2

Oauth is performed on the client by redirecting the user. To get the redirection URL, call GoTrue.url_for_provider/1:

GoTrue.url_for_provider(:google)
GoTrue.url_for_provider(:github)
GoTrue.url_for_provider(:gitlab)
GoTrue.url_for_provider(:bitbucket)
GoTrue.url_for_provider(:facebook)

Magic Link

Users can login without password, by requesting a magic link:

GoTrue.send_magic_link("user@example.com")

That sends them an email with a link to login. The link will contain the access_token & refresh_token.

If you're using password logins, sign in a user by passing the email & password to GoTrue.sign_in/1, it returns a JWT

GoTrue.sign_in(%{email: "user@example.com", password: "12345"})

Refreshing JWT

Each JWT expires based on your GoTrue server's settings. To refresh it, pass the refresh_token to GoTrue.refresh_access_token/1

# first get an access token, there are many ways:

# via sign up
%{access_token: jwt, refresh_token: refresh_token} = GoTrue.sign_up(...)

# or via login
%{access_token: jwt, refresh_token: refresh_token} = GoTrue.sign_in(...)

# or via a redirection from an oauth provider
def controller_action(conn, %{access_token: jwt, refresh_token: refresh_token}) do
  # put in session
end

# refresh it before it expires
%{access_token: new_jwt} = GoTrue.refresh_access_token(refresh_token)

Sign out

To revoke a JWT, call GoTrue.sign_out/1

GoTrue.sign_out(jwt)

Getting user info

The user's info can be accessed by calling GoTrue.get_user/1 with their current JWT:

GoTrue.get_user(jwt)

Updating user info

Using a JWT, the user's data can be updated by calling GoTrue.update_user/1

GoTrue.update_user(jwt, %{data: %{favorite_language: "elixir"}})

Invitations

User's can be invited by passing their email address to GoTrue.invite/1, this sends an email to the user with a link.

GoTrue.invite(%{email: "user@example.com"})

Settings

To view the server's auth settings, call GoTrue.settings()

License

MIT

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