[Home](./index.md) > [ibm-cloud-sdk-core](./ibm-cloud-sdk-core.md) > [VpcInstanceTokenManager](./ibm-cloud-sdk-core.vpcinstancetokenmanager.md) ## VpcInstanceTokenManager class Token Manager for VPC Instance Authentication. **Signature:** ```typescript export declare class VpcInstanceTokenManager extends JwtTokenManager ``` **Extends:** [JwtTokenManager](./ibm-cloud-sdk-core.jwttokenmanager.md) ## Constructors

Constructor	Modifiers	Description
[(constructor)(options)](./ibm-cloud-sdk-core.vpcinstancetokenmanager._constructor_.md)		Create a new VpcInstanceTokenManager instance.

## Methods

Method	Modifiers	Description
[isTokenExpired()](./ibm-cloud-sdk-core.vpcinstancetokenmanager.istokenexpired.md)	`protected`	Returns true iff the currently-cached IAM access token is expired. We'll consider an access token as expired when we reach its IAM server-reported expiration time minus our expiration window (10 secs). We do this to avoid using an access token that might expire in the middle of a long-running transaction within an IBM Cloud service.
[requestToken()](./ibm-cloud-sdk-core.vpcinstancetokenmanager.requesttoken.md)	`protected`
[setIamProfileCrn(iamProfileCrn)](./ibm-cloud-sdk-core.vpcinstancetokenmanager.setiamprofilecrn.md)		Sets the CRN of the IAM trusted profile to use when fetching the access token from the IAM token server.
[setIamProfileId(iamProfileId)](./ibm-cloud-sdk-core.vpcinstancetokenmanager.setiamprofileid.md)		Sets the Id of the IAM trusted profile to use when fetching the access token from the IAM token server.