Get a list of hubs names.
        
        Returns
        -------
        hubs : list
            List of hub names

def get_hubs(self):
        """Get a list of hubs names.
        
        Returns
        -------
        hubs : list
            List of hub names
        """
        # Use helm to get a list of hubs.
        output = helm(
            'list',
            '-q'
        )
        # Check if an error occurred.
        if output.returncode != 0:
            print("Something went wrong!")
            print(output.stderr)
        else:
            hubs = output.stdout.split()
            return hubs