How to use the @foal/typeorm.Permission function in @foal/typeorm

/* Add the admin group and permission */

    await createConnection({
      database: 'e2e_db.sqlite',
      entities: [ User, Permission, Group ],
      name: 'perm-connection',
      type: 'sqlite',
    });

    const user2 = await getRepository(User, 'perm-connection').findOne({ email: 'john@foalts.org' });
    if (!user2) {
      throw new Error('John was not found in the database.');
    }

    const perm = new Permission();
    perm.codeName = 'admin';
    perm.name = 'Admin permission';
    await getRepository(Permission, 'perm-connection').save(perm);

    const group = new Group();
    group.name = 'Administrators';
    group.codeName = 'administrators';
    group.permissions = [ perm ];
    await getRepository(Group, 'perm-connection').save(group);

    user2.groups = [ group ];
    await getRepository(User, 'perm-connection').save(user2);

    await getConnection('perm-connection').close();

    /* Access the route that requires a specific permission */

/* Add the admin group and permission */

    await createConnection({
      database: 'e2e_db.sqlite',
      entities: [ User, Permission, Group ],
      name: 'perm-connection',
      type: 'sqlite',
    });

    const user2 = await getRepository(User, 'perm-connection').findOne({ email: 'john@foalts.org' });
    if (!user2) {
      throw new Error('John was not found in the database.');
    }

    const perm = new Permission();
    perm.codeName = 'admin';
    perm.name = 'Admin permission';
    await getRepository(Permission, 'perm-connection').save(perm);

    const group = new Group();
    group.name = 'Administrators';
    group.codeName = 'administrators';
    group.permissions = [ perm ];
    await getRepository(Group, 'perm-connection').save(group);

    user2.groups = [ group ];
    await getRepository(User, 'perm-connection').save(user2);

    await getConnection('perm-connection').close();

    /* Access the route that requires a specific permission */

export async function main(args) {
  const permission = new Permission();
  permission.codeName = args.codeName;
  permission.name = args.name;

  await createConnection({
    database: './e2e_db.sqlite',
    entities: [ Permission ],
    type: 'sqlite',
  });

  try {
    console.log(
      await getManager().save(permission)
    );
  } catch (error) {
    console.log(error.message);
  } finally {

before(async () => {
    process.env.SETTINGS_SESSION_SECRET = 'session-secret';
    await createConnection({
      database: 'e2e_db.sqlite',
      dropSchema: true,
      entities: [ User, Permission, Group ],
      synchronize: true,
      type: 'sqlite',
    });

    const user1 = new User();
    const user2 = new User();

    const perm = new Permission();
    perm.codeName = 'access-foo';
    perm.name = 'Foo permission';
    await getRepository(Permission).save(perm);

    const group = new Group();
    group.name = 'Administrators';
    group.codeName = 'administrators';
    group.permissions = [ perm ];
    await getRepository(Group).save(group);

    user1.userPermissions = [ perm ];
    user2.groups = [ group ];

    await getRepository(User).save([ user1, user2 ]);

    const session1 = await createService(TypeORMStore).createAndSaveSessionFromUser(user1);