IElasticClient.UpdateByQuery In ASP .NET core

Question

I'm trying to update the document with this statement. IDK this is the correct argument to the UpdateByQuery method?

        [HttpPut("update")]
        public async Task<string> UpdateUser(User user)
        {
            var res = await elasticClient.UpdateByQuery<User>(x => x.Index("User").Query(q 
            => q.Match(m => m.Field(f => f.Email).Query(user.Email))));

            return response.Id;
        }

I want to update my user object by Email.
Thanks for your time.