Client controller, and WIP with edits and deletion of notice

src/main/resources/sql/data.sql

@@ -1,2 +1,7 @@
 INSERT INTO clients (email, first_name, image, last_name, password, role)
-VALUES ('dignissim.tempor.arcu@aol.ca', 'Diana', 'null', 'Harrison', 'password', 'USER');
+VALUES
+    ('dignissim.tempor.arcu@aol.ca', 'Diana', 'null', 'Harrison', 'password', 'USER'),
+    ('john.doe@example.com', 'John', 'null', 'Doe', 'password123', 'ADMIN'),
+    ('jane.smith@example.com', 'Jane', 'null', 'Smith', 'securepass', 'USER'),
+    ('michael.brown@example.com', 'Michael', 'null', 'Brown', 'mypassword', 'USER'),
+    ('emily.jones@example.com', 'Emily', 'null', 'Jones', 'passw0rd', 'USER');