Solution.py

class AuthenticationManager:
    def __init__(self, timeToLive: int):
        self.timeToLive = timeToLive
        self.tokens = {}

    def generate(self, tokenId: str, currentTime: int) -> None:
        self.tokens[tokenId] = currentTime + self.timeToLive

    def renew(self, tokenId: str, currentTime: int) -> None:
        expire_time = self.tokens.get(tokenId)
        if expire_time is None or expire_time <= currentTime:
            return
        self.tokens[tokenId] = currentTime + self.timeToLive

    def countUnexpiredTokens(self, currentTime: int) -> int:
        unexpiredCount = 0
        for val in self.tokens.values():
            if val > currentTime:
                unexpiredCount += 1
        return unexpiredCount


# Your AuthenticationManager object will be instantiated and called as such:
# obj = AuthenticationManager(timeToLive)
# obj.generate(tokenId,currentTime)
# obj.renew(tokenId,currentTime)
# param_3 = obj.countUnexpiredTokens(currentTime)