[Home](./index.md) > [@firebase/auth-types](./auth-types.md) > [AuthCredential](./auth-types.authcredential.md) ## AuthCredential class Interface that represents the credentials returned by an [AuthProvider](./auth-types.authprovider.md). Signature: ```typescript export abstract class AuthCredential ``` ## Remarks Implementations specify the details about each auth provider's credential requirements. ## Properties | Property | Modifiers | Type | Description | | --- | --- | --- | --- | | [providerId](./auth-types.authcredential.providerid.md) | | string | The authentication provider ID for the credential. | | [signInMethod](./auth-types.authcredential.signinmethod.md) | | string | The authentication sign in method for the credential. | ## Methods | Method | Modifiers | Description | | --- | --- | --- | | [fromJSON(json)](./auth-types.authcredential.fromjson.md) | static | Static method to deserialize a JSON representation of an object into an [AuthCredential](./auth-types.authcredential.md). | | [toJSON()](./auth-types.authcredential.tojson.md) | | Returns a JSON-serializable representation of this object. |