Cannot find Youtube channel membership API

Question

I have a creator account (saiupigliamosche) with partnership enabled. I'm trying to enable the youtube channel membership API, but I cannot find it in the google cloud console.

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I am stuck, I need help. Thanks

I tried also to use API via google developers website (https://developers.google.com/youtube/v3/docs/members/list?hl=it&apix_params=%7B%22part%22%3A%5B%22snippet%22%5D%2C%22managedByMe%22%3Atrue%7D)

but I keep getting the following error:

{
  "error": {
    "code": 400,
    "message": "The channel does not have Channel Memberships enabled.",
    "errors": [
      {
        "message": "The channel does not have Channel Memberships enabled.",
        "domain": "youtube.member",
        "reason": "channelMembershipsNotEnabled"
      }
    ]
  }
}