Mutation.js

import { addFragmentToInfo } from 'graphql-binding'
  async signup(parent, args, ctx, info) {
    args.email = args.email.toLowerCase();
    const password = await bcrypt.hash(args.password, 10);
    const user = await ctx.db.mutation.createUser(
      {
        data: {
          ...args,
          password,
          permissions: { set: ['USER'] },
        },
      },
      addFragmentToInfo(info, `fragment UserWithId on User { id }`)
    );
    const token = jwt.sign({ userId: user.id }, process.env.APP_SECRET);
    ctx.response.cookie('token', token, {
      maxAge: 1000 * 60 * 60 * 24 * 365,
      httpOnly: true,
    });
    return user;
  },