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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 login_service_description(self):
 """Login service description. The login service description _MUST_ include the token service description. The authentication pattern is indicated via the profile URI which is built using self.auth_pattern. """

        label = 'Login to ' + self.name
        if (self.auth_type):
            label = label + ' (' + self.auth_type + ')'
        desc = {"@id": self.login_uri,
                "profile": self.profile_base + self.auth_pattern,
                "label": label}
        if (self.header):
            desc['header'] = self.header
        if (self.description):
            desc['description'] = self.description
        return desc