Creates an access token.
Important: This endpoint is relevant for basic OAuth only. When authorizing with advanced OAuth use Refresh an Access Token instead.
The endpoint accepts raw HTTP requests. You must pass the request's body
parameters formatted as bytes in the raw HTTP request's body field,
following this template:
{"grant_type": "client_credentials", "client_id": "<APP_ID>", "client_secret": "<APP_SECRET_KEY>", "instance_id": "<INSTANCE_ID>"}.
When the call succeeds, Wix returns {"statusCode": 200} and the created access
token in the body field of the raw HTTP response.
In case the call fails, Wix returns the relevant 4XX error code in the raw
HTTP response's statusCode field and details
about the error in body. Error details follow the
conventions of the Internet Engineering Task Force (IETF).