Authentication
Auth0
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Configuration

In order to be able to use the auth0 authentication provider, you have to add the configuration to your newly added plugins. To do so here are the steps

1

Configure your auth0 developer console

2

Go to your medusa-config.js

3

Check that the variables are set with the appropriate values

const BACKEND_URL = process.env.BACKEND_URL || "localhost:9000"
const ADMIN_URL = process.env.ADMIN_URL || "localhost:7000"
const STORE_URL = process.env.STORE_URL || "localhost:8000"
 
const Auth0ClientId = process.env.AUTH0_CLIENT_ID || ""
const Auth0ClientSecret = process.env.AUTH0_CLIENT_SECRET || ""
const Auth0Domain = process.env.AUTH0_DOMAIN || ""

Then in your plugins collections, if you did not already inserted the plugin, add the following otherwise, you can just add the auth0 options to your auth plugin options

{
resolve: "medusa-plugin-auth",
/** @type {import('medusa-plugin-auth').AuthOptions} */
options: [
  {
    type: "auth0",
    // strict: "all", // or "none" or "store" or "admin"
    strict: "none",
    identifier: "auth0",
    clientID: Auth0ClientId,
    clientSecret: Auth0ClientSecret,
    auth0Domain: Auth0Domain,
    admin: {
      callbackUrl: `${BACKEND_URL}/admin/auth/auth0/cb`,
      failureRedirect: `${ADMIN_URL}/login`,
      // The success redirect can be overridden from the client by adding a query param `?redirectTo=your_url` to the auth url
      // This query param will have the priority over this configuration
      successRedirect: `${ADMIN_URL}/`
    },
    store: {
      callbackUrl: `${BACKEND_URL}/store/auth/auth0/cb`,
      failureRedirect: `${STORE_URL}/login`,
      // The success redirect can be overridden from the client by adding a query param `?redirectTo=your_url` to the auth url
      // This query param will have the priority over this configuration
      successRedirect: `${STORE_URL}/`
    }
  }
]
}

The options that are commented are optional and the value that you see are the default values

4

Update your client to add the authentication action

After authentication is successfull, the user will be redirected to the successRedirect url with a ?access_token=your_token query param and a session cookie will be set. Session will automatically be authenticated. The access token is a JWT that can be used with Authorization: Bearer <token> header to authenticate requests to the backend instead of using a session cookie.

Default behaviour

The default verifyCallback flow looks as follow (unless the strict option is changed to none or store or admin depending on the targeted domain)

  • for the admin
    • if the user trying to authenticate exists
      • then we are looking in the metadata to find if the strategy identifier is present in authProvider.
        • If it is not, the user authentication gets rejected.
        • In the case it is present, then the user authentication gets authorized.
    • if the user trying to authenticate does not exist, an unauthorized error will be returned
  • for the store
    • if the customer trying to authenticate exists
      • then we are looking in the metadata to find if the strategy identifier is present in authProvider.
        • If none are found, then the customer gets authenticated and can proceed and the metadata gets updated.
        • In the case another external authentication method have been used in the past, then an unauthorized will be returned.
    • if the customer trying to authenticate does not exist, a new customer will be created with a randomly generated password and the authentication flow follow the previous point

Request only access token in a JSON response

If you are using your Medusa application with a SPA or mobile frontend, you can request opt to receive the access token in a JSON response instead of a redirect.

To do this, you have to add ?returnAccessToken=true query parameter to your authentication call. Your authentication URL will then look like this: ${medusa_url}/${authPath}?returnAccessToken=true

The response will look like this:

{
    access_token: "<your-jwt-token>"
}
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