Как написать код ссылки на схему данной схемы в mongodb?

Question

## users
column name     | data type | details
----------------|-----------|-----------------------
id              | integer   | not null, primary key
first_name      | string    | not null
last_name       | string    | not null
phone_number    | string    | not null, indexed
country_code    | integer   | not null, indexed
authy           | integer   | not null, indexed

пациентов

column name     | data type | details
----------------|-----------|-----------------------
id              | integer   | not null, primary key
first_name      | string    | not null
last_name       | string    | not null
user_id         | integer   | not null, foreign key (references user), indexed