add optional arg user id to admin list contributions query

backend/src/graphql/resolver/ContributionResolver.ts

@@ -383,12 +383,15 @@ export class ContributionResolver {
     { currentPage = 1, pageSize = 3, order = Order.DESC }: Paginated,
     @Arg('statusFilter', () => [ContributionStatus], { nullable: true })
     statusFilter?: ContributionStatus[],
+    @Arg('userId', () => Int, { nullable: true })
+    userId?: number,
   ): Promise<ContributionListResult> {
     const [dbContributions, count] = await findContributions({
       order,
       currentPage,
       pageSize,
       withDeleted: true,
+      userId,
       relations: ['user'],
       statusFilter,
     })

backend/src/seeds/graphql/queries.ts

@@ -210,12 +210,14 @@ export const adminListContributions = gql`
     $pageSize: Int = 25
     $order: Order = DESC
     $statusFilter: [ContributionStatus!]
+    $userId: Int
   ) {
     adminListContributions(
       currentPage: $currentPage
       pageSize: $pageSize
       order: $order
       statusFilter: $statusFilter
+      userId: $userId
     ) {
       contributionCount
       contributionList {