# Login Mechanisms

We support 2 login mechanisms outlined below.

### 1. Metafi Login 

The user can login via Metafi SDK with the supported SSO mechanisms. We currently support Google SSO login, and Passwordless email login - and we are working on adding more login methods.

### 2. Custom Authentication 

If your game already has its own login mechanism implemented, you can still use the Metafi SDK by making use of this option.

You can choose to authenticate a user using any method of your choice, and pass in a unique UUID to the Metafi SDK, which will be associated with the user wallet permanently. 

### Passwordless Login 

Both mechanisms employ a Passwordless Login Flow. This enables a better UX for the user, without compromising on security.