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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def verify_registration(request):
 """ Verify registration via signature. """

    user = process_verify_registration_data(request.data)
    extra_data = None
    if registration_settings.REGISTER_VERIFICATION_AUTO_LOGIN:
        extra_data = perform_login(request, user)
    return get_ok_response('User verified successfully', extra_data=extra_data)