Describe an access group

describeGroup takes the following options:<br/><br/>withSites - to include the group's sites<br/><br/>JWT is required for this endpoint with at least one of the following scopes: o{params.orgId}-user:w,o{params.orgId}-user:r,o:w,o:r,s-o:w,s-o:r<br/><br/>Endpoint name: describeGroup