Auth0 is an "identity hub" that supports a number of authentication providers using different protocols: OAuth2, WS-Federation, etc.
Auth0 supports the following identity providers:
Auth0 supports the following social providers out of the box. Additionally, you can add any OAuth2 Authorization Server.
Auth0 provides database connections to authenticate users with an email or username and a password and securely store these credentials in the Auth0 user store, or in your own database. See Database Connections for the full documentation.
Full documentation on Passwordless authentication can be found here.
Auth0 sits between your app and the identity provider that authenticates your users. Through this level of abstraction, Auth0 keeps your app isolated from any changes to and idiosyncrasies of each provider's implementation. In addition, Auth0's normalized user profile simpifies user management.
Note: The relationship between Auth0 and any of these authentication providers is called a 'connection'
Auth0 is a multi-tenant service. When you register with Auth0, you get your own namespace (YOUR_NAMESPACE). Many of these identity providers require registration and you will need to provide a
return url. This will always be:
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