Unit 6 quiz, srv message

Course Support ROS Basics In 5 Days (Python)
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File “/home/user/catkin_ws/src/services_quiz/scripts/bb8_move_custom_service_server.py”, line 4, in
from services_quiz.srv import BB8CustomServiceMessage, BB8CustomServiceMessageResponse
ModuleNotFoundError: No module named ‘services_quiz’
I am getting this error that says that no module name ‘services_quiz’, and i just created the srv directory in the services_quiz folder just as mentioned in the course, and i added the .srv file, then i modified the CMakeLists.txt and the package.xml, where may the problem be??

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Hello,
did you compile and source?

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yes, i did, and there was no problem

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is it present in the packages list, have you checked?

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yes

/home/user/catkin_ws/src/services_quiz/srv,
this is the path

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and here i imported it:
from services_quiz.srv import BB8CustomServiceMessage, BB8CustomServiceMessageResponse

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