fix(oauth): compute userCounts properly

packages/api/src/services/oauth.ts

@@ -70,8 +70,7 @@ export const ThirdPartyApp = builder.prismaObject('ThirdPartyApp', {
     }),
     usersCount: t.int({
       async resolve({ id }) {
-        return new Set(
-          await prisma.thirdPartyCredential.findMany({
+        const tokens = await prisma.thirdPartyCredential.findMany({
           where: {
             clientId: id,
             type: ThirdPartyCredentialType.AccessToken,
@@ -80,8 +79,8 @@ export const ThirdPartyApp = builder.prismaObject('ThirdPartyApp', {
           select: {
             ownerId: true,
           },
-          }),
-        ).size;
+        });
+        return new Set(tokens.map((token) => token.ownerId)).size;
       },
     }),
     description: t.exposeString('description'),