fix: Match search requests from Slack using Integration for non-Slack teams (#1599)

* Match slack hook requests to integration

server/test/factories.js

@@ -10,6 +10,8 @@ import {
   Group,
   GroupUser,
   Attachment,
+  Authentication,
+  Integration,
 } from "../models";
 
 let count = 0;
@@ -68,6 +70,33 @@ export async function buildUser(overrides: Object = {}) {
   });
 }
 
+export async function buildIntegration(overrides: Object = {}) {
+  if (!overrides.teamId) {
+    const team = await buildTeam();
+    overrides.teamId = team.id;
+  }
+
+  const user = await buildUser({ teamId: overrides.teamId });
+
+  const authentication = await Authentication.create({
+    service: "slack",
+    userId: user.id,
+    teamId: user.teamId,
+    token: "fake-access-token",
+    scopes: ["example", "scopes", "here"],
+  });
+
+  return Integration.create({
+    type: "post",
+    service: "slack",
+    settings: {
+      serviceTeamId: "slack_team_id",
+    },
+    authenticationId: authentication.id,
+    ...overrides,
+  });
+}
+
 export async function buildCollection(overrides: Object = {}) {
   count++;