[Home](./index.md) > [ibm-cloud-sdk-core](./ibm-cloud-sdk-core.md) > [IamRequestBasedTokenManager](./ibm-cloud-sdk-core.iamrequestbasedtokenmanager.md) > [(constructor)](./ibm-cloud-sdk-core.iamrequestbasedtokenmanager._constructor_.md) ## IamRequestBasedTokenManager.(constructor) Create a new IamRequestBasedTokenManager instance. **Signature:** ```typescript constructor(options: IamRequestOptions); ``` ## Parameters

Parameter	Type	Description
options	[IamRequestOptions](./ibm-cloud-sdk-core.iamrequestoptions.md)	Configuration options. This should be an object containing these fields: - url: (optional) the endpoint URL for the token service (default value: "https://iam.cloud.ibm.com") - disableSslVerification: (optional) a flag that indicates whether verification of the token server's SSL certificate should be disabled or not - headers: (optional) a set of HTTP headers to be sent with each request to the token service - clientId: (optional) the "clientId" and "clientSecret" fields are used to form a Basic Authorization header to be included in each request to the token service - clientSecret: (optional) the "clientId" and "clientSecret" fields are used to form a Basic Authorization header to be included in each request to the token service - scope: (optional) the "scope" parameter to use when fetching the bearer token from the token service

## Exceptions Error: the configuration options are not valid.