got rubric creation working

Management/Models/CanvasModels/Assignments/CanvasRubricAssociation.cs

@@ -0,0 +1,35 @@
+namespace CanvasModel.Assignments;
+
+public record CanvasRubricAssociation
+{
+  [JsonPropertyName("id")]
+  public ulong Id { get; set; }
+
+  [JsonPropertyName("rubrid_id")]
+  public ulong RubricId { get; set; }
+
+  [JsonPropertyName("association_id")]
+  public ulong AssociationId { get; set; }
+
+  [JsonPropertyName("association_type")]
+  public required string AssociationType { get; set; }
+
+  [JsonPropertyName("use_for_grading")]
+  public bool UseForGrading { get; set; }
+
+  [JsonPropertyName("summary_data")]
+  public string? SummaryDaata { get; set; }
+
+  [JsonPropertyName("purpose")]
+  public required string Purpose { get; set; }
+
+  [JsonPropertyName("hide_score_total")]
+  public bool? HideScoreTotal { get; set; }
+
+  [JsonPropertyName("hide_points")]
+  public bool HidePoints { get; set; }
+
+  [JsonPropertyName("hide_outcome-results")]
+  public bool HideOUtcomeResult { get; set; }
+
+}