Correct way is:
var data = await getRepository(User)
.createQueryBuilder("user")
.where("user.firstName like :name", { name:`%${firstName}%` })
.getMany();
Correct way is:
var data = await getRepository(User)
.createQueryBuilder("user")
.where("user.firstName like :name", { name:`%${firstName}%` })
.getMany();