Unauthorized Mutation Error - MUTATION_NOT_AUTHORIZED_ERROR

This error is triggered when a user submits a mutation request to a resource they do not have access to.

The JSON response structure is:

{
  "errors": [
    {
      "message": "You do not have permission to perform this mutation",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "createProposal"
      ],
      "extensions": {
        "code": "MUTATION_NOT_AUTHORIZED_ERROR"
      }
    }
  ],
  "data": {
    "createProposal": null
  }
}