REFACTOR: Moved user routes into user blueprint, and grouped them, fixed some (not all) routes

web_server/database/testing_data.sql

@@ -131,4 +131,8 @@ INSERT INTO follows (user_id, followed_id, since) VALUES
 INSERT INTO followed_categories (user_id, category_id) VALUES
 (7, 1),
 (7, 2),
-(7, 3);
+(7, 3);
+
+INSERT INTO subscribes (user_id, subscribed_id, since, expires) VALUES 
+(7, 1, '2024-08-30', '2025-02-28'),
+(7, 2, '2024-08-30', '2025-02-15');

web_server/database/users.sql

@@ -46,7 +46,7 @@ CREATE TABLE subscribes
     subscribed_id INTEGER NOT NULL,
     since DATETIME NOT NULL,
     expires DATETIME NOT NULL,
-    PRIMARY KEY (user_id),
+    PRIMARY KEY (user_id, subscribed_id),
     FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
     FOREIGN KEY (subscribed_id) REFERENCES users(user_id) ON DELETE CASCADE   
 );