Microsoft Graph Java SDK v.6.16.0 return empty site list with "*" and ""(empty) search query parameter

Describe the bug

Create GraphServiceClient with UsernamePasswordCredential provider

var provider = new UsernamePasswordCredentialBuilder()
                .clientId("client_id")
                .username("username")
                .password("password");
var graphClient = new GraphServiceClient(provider);

Call graphClient.sites().get().getValue()

Expected result: receive a list of the sites
Actual result: an empty list was returned without any error.

GraphServiceClient with ClientSecretCredential provider works as expected on graphClient.sites().get().getValue() call.

SDK Version

6.16.0

Start by reproducing the issue through GraphServiceClient.sites().get().getValue() with UsernamePasswordCredentialBuilder, then compare it with ClientSecretCredential. Investigate how the SDK handles the empty or "*" site search query under each credential provider. Done means the username/password flow returns the expected site list without regressing the client-secret flow.