Dhan API not working

I’m trying to get realtime data using Dhan API. I’m getting the following error:
{‘status’: ‘failure’,
‘remarks’: {‘error_code’: ‘HTTP429’,
‘message’: ‘Your account is not authorize to use this API. Fulfill eligibility criteria or subscribe the plan.’},
‘data’: ‘’}

I’ve already subscribed to Data APIs. Is there something else I need to do?