Hi,
Thanks for posting your concern.
Could you confirm if you are using AdWords API or Google Ads API? Then, could you provide more details on what you want achieve with the API? If what you want is to generate credentials, then, you can follow this guide and feel free to write back if you have clarifications.
Also, if I misunderstood your concern let me know and provide more context.
Regards,
Ejay
Google Ads API Team