I am using PostgreSQL 11.8 in AWS RDS and I created a user as below:

```
CREATE USER test WITH LOGIN;
GRANT rds_iam TO test;

```

the code runs success but I can't find the user `test` from:

```
SELECT * FROM information_schema.table_privileges where grantee='test';

```

it returns an empty result to me.

I am able to see that user by running

`SELECT *FROM pg_catalog.pg_user where usename='test';`.

Why can't I grant access to the user?