UserListingActivity Error

[GustavoCaramaschi]

I'm getting the following errors for the following segment of code, I have been trying to figure this out but having little to no luck with it:
Errors:
error: cannot find symbol variable tab_layout_user_listing
error: cannot find symbol variable view_pager_user_listing
Segment of Code:
private void bindViews() {
mToolbar = (Toolbar) findViewById(R.id.toolbar);
mTabLayoutUserListing = (TabLayout) findViewById(R.id.tab_layout_user_listing);
mViewPagerUserListing = (ViewPager) findViewById(R.id.view_pager_user_listing);
}