[Home](./index.md) > [@firebase/auth](./auth.md) > [OAuthProvider](./auth.oauthprovider.md)
## OAuthProvider class
Provider for generating generic [OAuthCredential](./auth.oauthcredential.md).
Signature:
```typescript
export declare class OAuthProvider implements AuthProvider
```
Implements: [AuthProvider](./auth.authprovider.md)
## Example 1
```javascript
// Sign in using a redirect.
const provider = new OAuthProvider('google.com');
// Start a sign in process for an unauthenticated user.
provider.addScope('profile');
provider.addScope('email');
await signInWithRedirect(auth, provider);
// This will trigger a full page redirect away from your app
// After returning from the redirect when your app initializes you can obtain the result
const result = await getRedirectResult(auth);
if (result) {
// This is the signed-in user
const user = result.user;
// This gives you a OAuth Access Token for the provider.
const credential = provider.credentialFromResult(auth, result);
const token = credential.accessToken;
}
```
## Example 2
```javascript
// Sign in using a popup.
const provider = new OAuthProvider('google.com');
provider.addScope('profile');
provider.addScope('email');
const result = await signInWithPopup(auth, provider);
// The signed-in user info.
const user = result.user;
// This gives you a OAuth Access Token for the provider.
const credential = provider.credentialFromResult(auth, result);
const token = credential.accessToken;
```
## Constructors
| Constructor | Modifiers | Description |
| --- | --- | --- |
| [(constructor)(providerId)](./auth.oauthprovider._constructor_.md) | | Constructor for generic OAuth providers. |
## Properties
| Property | Modifiers | Type | Description |
| --- | --- | --- | --- |
| [providerId](./auth.oauthprovider.providerid.md) | | string | |
## Methods
| Method | Modifiers | Description |
| --- | --- | --- |
| [addScope(scope)](./auth.oauthprovider.addscope.md) | | Add an OAuth scope to the credential. |
| [credential(params)](./auth.oauthprovider.credential.md) | | Creates a [OAuthCredential](./auth.oauthcredential.md) from a generic OAuth provider's access token or ID token. |
| [credentialFromError(error)](./auth.oauthprovider.credentialfromerror.md) | static | Used to extract the underlying [OAuthCredential](./auth.oauthcredential.md) from a [AuthError](./auth.autherror.md) which was thrown during a sign-in, link, or reauthenticate operation. |
| [credentialFromJSON(json)](./auth.oauthprovider.credentialfromjson.md) | static | |
| [credentialFromResult(userCredential)](./auth.oauthprovider.credentialfromresult.md) | static | Used to extract the underlying [OAuthCredential](./auth.oauthcredential.md) from a [UserCredential](./auth.usercredential.md). |
| [getCustomParameters()](./auth.oauthprovider.getcustomparameters.md) | | Retrieve the current list of [CustomParameters](./auth.customparameters.md). |
| [getScopes()](./auth.oauthprovider.getscopes.md) | | Retrieve the current list of OAuth scopes. |
| [setCustomParameters(customOAuthParameters)](./auth.oauthprovider.setcustomparameters.md) | | Sets the OAuth custom parameters to pass in an OAuth request for popup and redirect sign-in operations. |
| [setDefaultLanguage(languageCode)](./auth.oauthprovider.setdefaultlanguage.md) | | Set the language gode. |