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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 encode_eternal_jwt_token(self, user, **custom_claims):
 """ This utility function encodes a jwt token that never expires .. note:: This should be used sparingly since the token could become a security concern if it is ever lost. If you use this method, you should be sure that your application also implements a blacklist so that a given token can be blocked should it be lost or become a security concern """

        return self.encode_jwt_token(
            user,
            override_access_lifespan=VITAM_AETERNUM,
            override_refresh_lifespan=VITAM_AETERNUM,
            **custom_claims
        )