## User sign-in

Frontegg allows you to configure different authentication methods for users to sign in. You can enable multiple options based on your security and user experience preferences. Which identifier a user enters — email, username, or phone number — depends on the method you enable and how you configured sign-up. See [Login identifiers](/ciam/guides/authentication/login-identifiers/overview) for the full picture.

### Available sign-in methods

#### Quick sign-in

Provides fast authentication methods:

* **Passkeys** — Allows users to log in using passkey-based authentication.
* **SMS login** — Sends a one-time code to the user's **phone number** for authentication.


#### Single sign-on (SSO)

Allows users to authenticate via external identity providers:

* **OIDC** — Supports OpenID Connect-based authentication.
* **SAML** — Enables authentication via SAML-based identity providers.


If a user doesn't log in using SSO, they will receive a one-time code via email for authentication.

#### Email sign-in

Users can authenticate with the following methods:

* **Magic code** — Users enter their **email or username** and receive a one-time code via email.
* **Magic link** — Users enter their **email or username** and receive a login link via email.
* **Password** — Users enter their **email or username** and a password (optional password strength meter available).


### Identifiers and sign-in methods

The table below shows which identifier users provide for each enabled method:

| Sign-in method | Identifier users enter |
|  --- | --- |
| Password | Email or username |
| Magic code | Email or username |
| Magic link | Email or username |
| SMS login | Phone number |
| Passkeys | Device-bound; no manual identifier entry |
| SSO | Identity provider credentials |


Make sure the identifiers you enable for sign-in match what you collect at [sign-up](/ciam/guides/login-box/settings/user-signup). For example, if you offer SMS login, include **Phone number** on the signup form or let users add a phone number in the self-service portal.

### Enabling user sign-in

1. Navigate to the **Sign-in types** section of the Frontegg Builder.


![user-sign-in](/assets/user-signin.ef0a03d66fcbc813960d1f46d5a1d39da0e43d9423218658bcf2a2ddf8abb406.56bb33c9.png)

1. Toggle on the desired sign-in methods:
  * **Quick sign-in** → Enable Passkeys or SMS login.
  * **Single sign-on (SSO)** → Enable OIDC or SAML.
  * **Email sign-in** → Enable Magic code, Magic link, or Password.
2. If enabling password-based authentication, click **Manage Password Strength Meter** to adjust password policies. To guide users in choosing strong passwords, toggle on the **Password Strength Meter** option. This will display strength guidance when users activate their accounts or change their passwords.


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Styles & localizations
The additional screen will automatically match your application's styles and logo as configured in the builder. To customize text on each screen, refer to [this guide](/ciam/sdks/customizations/configuration-old).