Defined the GET /users/{username}/contributions endpoint for the Open API specification document in the library target.

Sources/DiscogsService/openapi.yaml

@@ -968,6 +968,47 @@ paths:
           $ref: '#/components/responses/NotFound'
         '500':
           $ref: '#/components/responses/InternalError'
+  /users/{username}/contributions:
+    get:
+      tags:
+        - User Identity
+      summary: Get contributions of a user.
+      description: |
+        Retrieves all the contributions or additions to releases, labels, and artist done by username.
+
+        This endpoints accepts pagination headers.
+      operationId: getUserContributions
+      parameters:
+        - $ref: '#/components/parameters/Username'
+        - $ref: '#/components/parameters/SortField'
+        - $ref: '#/components/parameters/SortOrder'
+      responses:
+        '200':
+          description: Successfully retrieved items contributed by a user.
+          headers:
+            X-Discogs-RateLimit:
+              $ref: '#/components/headers/RateLimit'
+            X-Discogs-RateLimit-Used:
+              $ref: '#/components/headers/RateLimitUsed'
+            X-Discogs-RateLimit-Remaining:
+              $ref: '#/components/headers/RateLimitRemaining'
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  pagination:
+                    $ref: '#/components/schemas/Pagination'
+                  submissions:
+                    description: A type that represents all items submitted by a user.
+                    $ref: '#/components/schemas/UserItems'
+                required:
+                  - pagination
+                  - contributions
+        '404':
+          $ref: '#/components/responses/NotFound'
+        '500':
+          $ref: '#/components/responses/InternalError'
   /users/{username}/submissions:
     get:
       tags:
@@ -1217,11 +1258,25 @@ components:
       in: query
       schema:
         type: string    
+    SortField:
+      description: A filter by field.
+      name: sort
+      in: query
+      schema:
+        type: string
+        enum:
+          - label
+          - artist
+          - title
+          - catno
+          - format
+          - rating
+          - year
+          - added
     SortOrder:
       description: The order to sort the results. 
       name: sort_order
       in: query
-      required: false
       schema:
         type: string
         enum: