Friendly Unsupported Blockchain Action API Error Message

[kespinola]

Issue

When action is unsupported the credit client returns the below error which isn't descriptive to the user.

{
  "data": null,
  "errors": [
    {
      "message": "Error processing line item CreateCollection for Polygon",
      "locations": [
        {
          "line": 1,
          "column": 71
        }
      ],
      "path": [
        "createCollection"
      ]
    }
  ]
}

Requirement

• API error should be "The blockchain {blockchain} does not support the action {action}"