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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 handle(self, **options):
 """Call "startapp" to generate app with custom user model."""

        template = os.path.dirname(os.path.abspath(__file__)) + "/app_template"
        name = options.pop("name")
        call_command("startapp", name, template=template, **options)