JPA: How to get the sum of a nested jsonb entity - postgresql

Question

I am trying to return an object the sum of points, which is an integer, which belongs to an object, foo of type jsonb, which is being referenced by the main object user, however, the sum keeps ending up as a null value, even though I can see that is not the case when i just return everything from the table.
Here is what I have:
#Query(
nativeQuery = true,
value =
"SELECT u.user_id, "
+ "SUM(CAST(u.foo->>'points' AS INTEGER)) AS totalActivePoints "
+ "FROM banpoint.user u "
+ "WHERE u.user_id = :userId "
+ "AND (u.end_date IS NULL OR u.end_date > now()) "
+ "GROUP BY u.user_id "
)
Optional<Map<String, Object>> getPointSum(long userId);
My tables look like
CREATE TABLE IF NOT EXISTS foo
(
type TEXT NOT NULL PRIMARY KEY,
points INTEGER NOT NULL,
...
);
CREATE TABLE IF NOT EXISTS user
(
id BIGSERIAL NOT NULL PRIMARY KEY,
user_id BIGINT NOT NULL,
start_date TIMESTAMP DEFAULT NULL,
end_date TIMESTAMP DEFAULT NULL,
foo JSONB NOT NULL
);
Sample data from user table as json:
{
"id" : 1,
"userId" : 1234,
"startDate" : 1656668960145,
"endDate" : 1657273760146,
"foo" : {
"type" : "BOTS",
"points" : 23
}
}
}
{
"id" : 2,
"userId" : 1234,
"startDate" : 1656668960204,
"endDate" : 1657878560146,
"foo" : {
"type" : "TRIGGERBOT",
"points" : 14
}
}
}
How can I properly get the sum of this field properly, which belongs to the JSONB object?
Im using PSQL 14
EDIT:
also have tried it the following way, but the result is still null
#Query(
nativeQuery = true,
value =
"SELECT SUM(CAST(u.foo->'foo'->>'points' AS INTEGER)) AS totalActivePoints "
+ "FROM banpoint.user u "
+ "WHERE u.user_id = :userId "
+ "AND (u.end_date IS NULL OR u.end_date > now()) "
+ "GROUP BY u.user_id ")
Integer getPointSum(long userId);
Additionally, returning a List<Object> instead of getting the sum ALSO returns a list with null values in it as well...