feat: Implement getAppConnections graphQL query

packages/backend/src/graphql/queries/get-app-connections.ts

@@ -0,0 +1,25 @@
+import { GraphQLList, GraphQLString, GraphQLNonNull } from 'graphql';
+import Connection from '../../models/connection';
+import RequestWithCurrentUser from '../../types/express/request-with-current-user';
+import connectionType from '../types/connection';
+
+type Params = {
+  key: string
+}
+
+const getAppConnectionsResolver = async (params: Params, req: RequestWithCurrentUser) => {
+  const connections = await Connection.query()
+    .where({ user_id: req.currentUser.id, verified: true, key: params.key })
+
+  return connections;
+}
+
+const getAppConnections = {
+  type: GraphQLList(connectionType),
+  args: {
+    key: { type: GraphQLNonNull(GraphQLString) }
+  },
+  resolve: (_: any, params: Params, req: RequestWithCurrentUser) => getAppConnectionsResolver(params, req)
+}
+
+export default getAppConnections;