feat: Implement getFlows graphQL query

packages/backend/src/graphql/queries/get-flows.ts

@@ -0,0 +1,18 @@
+import { GraphQLList, GraphQLString } from 'graphql';
+import Flow from '../../models/flow';
+import RequestWithCurrentUser from '../../types/express/request-with-current-user';
+import flowType from '../types/flow';
+
+const getFlowsResolver = async (req: RequestWithCurrentUser) => {
+  const flows = await Flow.query()
+    .where({ user_id: req.currentUser.id});
+
+  return flows;
+}
+
+const getFlows = {
+  type: GraphQLList(flowType),
+  resolve: (_: any, _params: any, req: RequestWithCurrentUser) => getFlowsResolver(req)
+}
+
+export default getFlows;