> For the complete documentation index, see [llms.txt](https://docs.wepin.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wepin.io/en/widget-integration/flutter-sdk/login-library/installation.md).

# Installation

**Requirements**

* **Android:** API version <mark style="color:blue;">**21**</mark> or higher
* **iOS:** Version <mark style="color:blue;">**13.0**</mark> or higher
  * Update the `platform :ios` version to <mark style="color:blue;">**13.0**</mark> in your Flutter project’s `ios/Podfile`, and verify and modify the `ios/Podfile` as needed.

{% hint style="info" %}
This package is only available for **Android** and **iOS** environments. It is not supported on **Web**, **macOS**, **Windows**, or **Linux** environments.
{% endhint %}

## **Installation**

The Wepin Flutter Login Library is published on pub.dev, and you can install it by adding the following command or by adding a dependency in your app's `pubspec.yaml`.

* **Add using Flutter pub add command:**

```bash
$ flutter pub add wepin_flutter_login_lib
```

* **Add to dependencies in `pubspec.yaml`:**

```yaml
dependencies:
    wepin_flutter_login_lib: ^0.0.1
```

## Configuration

### **Deep Link Configuration**

To enable OAuth login functionality (`loginWithOauthProvider`), you need to configure the Deep Link scheme.

* **Deep Link scheme format:** `wepin.` + `Wepin App ID`

#### **Android**

* Add `manifestPlaceholders` to the `build.gradle (app)` file to easily capture all redirects using this custom scheme with the Wepin Widget SDK.

{% code title="build.gradle(app)" %}

```gradle
// Deep Link configuration => Redirect scheme format: wepin. + Wepin App ID
android.defaultConfig.manifestPlaceholders = [
  'appAuthRedirectScheme': 'wepin.{{YOUR_WEPIN_APPID}}'
]
```

{% endcode %}

#### **iOS**

* Add the app’s URL scheme to the `Info.plist` file to redirect back to the app after the authentication process.

{% code title="Info.plist" %}

```xml
<key>CFBundleURLTypes</key>
<array>
    <dict>
        <key>CFBundleURLName</key>
        <string>unique name</string>
        <key>CFBundleURLSchemes</key>
        <array>
            <string>wepin.{{YOUR_WEPIN_APPID}}</string>
        </array>
    </dict>
</array>
```

{% endcode %}


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