How do i resolve the API

you need to get the API key first of all and then you can create the project and for getting the api key please refer the documentation - https://developers.google.com/maps/documentation/geocoding/get-api-key
to see how you can generate your own api key

Do i have to enter my, credit card details is there no way out of it? It is asking me to add “create billing system” when i try to use the API key.

It is free for limited no. of queries. You just create your account and get the API key to use.

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