[Home](./index.md) > [@firebase/auth](./auth.md) > [OAuthProvider](./auth.oauthprovider.md) > [credentialFromJSON](./auth.oauthprovider.credentialfromjson.md) ## OAuthProvider.credentialFromJSON() method Creates an [OAuthCredential](./auth.oauthcredential.md) from a JSON string or a plain object. Signature: ```typescript static credentialFromJSON(json: object | string): OAuthCredential; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | json | object \| string | A plain object or a JSON string | Returns: [OAuthCredential](./auth.oauthcredential.md)