feat: Create testConnection graphQL query

packages/backend/src/graphql/queries/test-connection.ts

@@ -0,0 +1,31 @@
+import { GraphQLString, GraphQLNonNull, GraphQLBoolean } from 'graphql';
+import Connection from '../../models/connection';
+import RequestWithCurrentUser from '../../types/express/request-with-current-user';
+
+type Params = {
+  id: string,
+  data: object
+}
+const testConnectionResolver = async (params: Params, req: RequestWithCurrentUser) => {
+  let connection = await Connection.query().findOne({
+    user_id: req.currentUser.id,
+    id: params.id
+  })
+
+  const appClass = (await import(`../../apps/${connection.key}`)).default;
+
+  const appInstance = new appClass(connection.data)
+  const isStillVerified = await appInstance.isStillVerified();
+
+  return isStillVerified;
+}
+
+const testConnection = {
+  type: GraphQLBoolean,
+  args: {
+    id: { type: GraphQLNonNull(GraphQLString) }
+  },
+  resolve: (_: any, params: Params, req: RequestWithCurrentUser) => testConnectionResolver(params, req)
+};
+
+export default testConnection;