added remove student api

src/main/resources/db/migration/V2.1__remove_student_from_class.sql

@@ -0,0 +1,22 @@
+do
+$$
+DECLARE
+remove_student integer;
+    tutor integer;
+BEGIN
+
+-- Api Resource
+INSERT INTO qms_auth.api_resource(method, path)
+VALUES( 'DELETE', '/class/(\d+)/student/(\d+)');
+
+-- Grants
+SELECT id into remove_student FROM qms_auth.api_resource WHERE path = '/class/(\d+)/student/(\d+)' and method = 'DELETE';
+
+select id into tutor FROM qms_auth.role where name = 'tutor';
+
+/*generate question from ai*/
+INSERT INTO qms_auth.role_api_resource(resource_id, role_id)
+VALUES(remove_student, tutor);
+
+END;
+$$;