fix(intercom-client): fix find methods (#42230)
fix(intercom-client): fix find methods (#42230)

Change return type find method that returns promise and find method with callback from User to UserList
dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,markogresak/DefinitelyTyped,mcliment/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped