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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 create_user(self, ):
 """Create a user and store it in the self.user :returns: None :rtype: None :raises: None """

        name = self.username_le.text()
        if not name:
            self.username_le.setPlaceholderText("Please provide a username.")
            return
        first = self.first_le.text()
        last = self.last_le.text()
        email = self.email_le.text()
        try:
            user = djadapter.models.User(username=name, first_name=first, last_name=last, email=email)
            user.save()
            for prj in self.projects:
                prj.users.add(user)
            for task in self.tasks:
                task.users.add(user)
            self.user = user
            self.accept()
        except:
            log.exception("Could not create new assettype")