How to call MSAL with the help of `Office.auth.getAuthContext()` response?

In Microsoft documentation for the Office.auth.getAuthContext() method, it mentions:

"Gets information about the signed-in user. The add-in can pass this information to the Microsoft Authentication Library (MSAL.js) to get an access token for the current session."

When you call Office.auth.getAuthContext(), it provides the following details:

{authorityBaseUrl:"https://login.windows.net"`

authorityType: "aad"

loginHint: "[email protected]"

tenantId: "abcd"

userObjectId: "xyz"

userPrincipalName: "[email protected]" }

How can this response from Office.auth.getAuthContext() be utilized in MSAL.js to acquire an access token?