Block a user
test(permissions): unit & e2e tests for GET /permissions
test(modules): unit, integration & e2e tests for modules CRUD
test(roles): unit, integration & e2e tests for roles CRUD
test(users): integration & e2e tests for users CRUD
test(promotions): unit, integration & e2e tests for promotions CRUD
test(students): add real handler tests for /students endpoints
test(students): add unit, integration and e2e tests for /students (#109)