> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cdp.coinbase.com/llms.txt
> Use this file to discover all available pages before exploring further.

# AuthMethod

```ts theme={null}
type AuthMethod = 
  | typeof AUTH_METHODS[number]
  | `oauth:${OAuth2ProviderType}`
  | `siwe:${SiweProviderType}`;
```

The auth method type. Includes built-in methods (`"email"`, `"sms"`), OAuth providers (e.g. `"oauth:google"`), and SIWE providers (e.g. `"siwe:base"`).

See [Sign in with Base](/wallets/authentication/siwe#sign-in-with-base) for SIWE integration guidance.