# Login user

> Web3Auth Unreal SDK - login | Embedded Wallets

This function helps your user to trigger the login process. The login flow will be triggered based on the selected provider.

## Parameters

`UWeb3AuthSDK::GetInstance()->Login()` requires `FWeb3AuthLoginParams` as a required input.

### `FWeb3AuthLoginParams`

<Tabs
  defaultValue="table"
  values={[
    { label: "Table", value: "table" },
    { label: "Interface", value: "interface" },
  ]}
>

<TabItem value="table">

| Parameter            | Description                                                                                                                                                                                                                                     |
| -------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `loginProvider`      | It sets the OAuth login method to be used. You can use any of the supported values are `GOOGLE`, `FACEBOOK`, `REDDIT`, `DISCORD`, `TWITCH`, `APPLE`, `LINE`, `GITHUB`, `KAKAO`, `LINKEDIN`, `TWITTER`, `WEIBO`, `WECHAT`, `EMAIL_PASSWORDLESS`. |
| `extraLoginOptions?` | It can be used to set the OAuth login options for corresponding `loginProvider`. For instance, you'll need to pass user's email address as. Default value for the field is `null`, and it accepts `FExtraLoginOptions` as a value.              |
| `redirectUrl?`       | URL where user will be redirected after successfull login. By default user will be redirected to same page where login will be initiated. Default value for the field is `null`, and accepts `FString` as a value.                              |
| `appState?`          | It can be used to keep track of the app state when user will be redirected to app after login. Default is `null`, and accepts `FString` as a value.                                                                                             |
| `mfaLevel?`          | Customize the MFA screen shown to the user during OAuth authentication. Default value for field is `MFALevel.DEFAULT`, which shows MFA screen every 3rd login. It accepts `FMFALevel` as a value.                                               |
| `dappShare?`         | Custom verifier logins can get a dapp share returned to them post successful login. This is useful if the dapps want to use this share to allow users to login seamlessly. It accepts `FString` as a value.                                     |
| `curve?`             | It will be used to determine the public key encoded in the JWT token which returned in `getUserInfo` function after user login. The default value is `FCurve::speck256k1`.                                                                      |

</TabItem>

<TabItem value="interface">

```cpp
USTRUCT(BlueprintType)
struct FLoginParams
{
	GENERATED_BODY()

	UPROPERTY(EditAnywhere, BlueprintReadWrite)
		FString loginProvider;

	UPROPERTY(EditAnywhere, BlueprintReadWrite)
		FString dappShare;

	UPROPERTY(EditAnywhere, BlueprintReadWrite)
		FExtraLoginOptions extraLoginOptions;

	UPROPERTY(EditAnywhere, BlueprintReadWrite)
		FString appState;

	UPROPERTY(EditAnywhere, BlueprintReadWrite)
		FString redirectUrl;

	UPROPERTY(EditAnywhere, BlueprintReadWrite)
		FMFALevel mfaLevel;

	UPROPERTY(EditAnywhere, BlueprintReadWrite)
		FCurve curve;

	FLoginParams() {};
};
```

</TabItem>

</Tabs>

## Provider

```cpp
UENUM(BlueprintType)
enum class EWeb3AuthProvider : uint8
{
    GOOGLE UMETA(DisplayName = "Google"),
    FACEBOOK UMETA(DisplayName = "Facebook"),
    REDDIT UMETA(DisplayName = "Reddit"),
    DISCORD UMETA(DisplayName = "Discord"),
    TWITCH UMETA(DisplayName = "Twitch"),
    APPLE UMETA(DisplayName = "Apple"),
    LINE UMETA(DisplayName = "Line"),
    GITHUB UMETA(DisplayName = "GitHub"),
    KAKAO UMETA(DisplayName = "Kakao"),
    LINKEDIN UMETA(DisplayName = "LinkedIn"),
    TWITTER UMETA(DisplayName = "Twitter"),
    WEIBO UMETA(DisplayName = "Weibo"),
    WECHAT UMETA(DisplayName = "WeChat"),
    EMAIL_PASSWORDLESS UMETA(DisplayName = "Email Passwordless"),
    JWT UMETA(DisplayName = "JWT")
};
```

## Usage

```cpp
void AYourGameMode::LoginWithGoogle()
{
    FWeb3AuthLoginParams LoginParams;
    LoginParams.LoginProvider = TEXT("google");

    UWeb3AuthSDK::GetInstance()->Login(LoginParams);
}

UFUNCTION()
void AYourGameMode::OnWeb3AuthLoginSuccess(const FString& PrivateKey, const FString& PublicAddress)
{
    UE_LOG(LogTemp, Warning, TEXT("Web3Auth Login Success - Private Key: %s"), *PrivateKey);
    UE_LOG(LogTemp, Warning, TEXT("Web3Auth Login Success - Address: %s"), *PublicAddress);
}
```