import sys
import redis

from zou.app import config


try:
    revoked_tokens_store = redis.StrictRedis(
        host=config.KEY_VALUE_STORE["host"],
        port=config.KEY_VALUE_STORE["port"],
        db=config.AUTH_TOKEN_BLACKLIST_KV_INDEX,
        decode_responses=True
    )
    revoked_tokens_store.get(None)
except:
    try:
        import fakeredis
        revoked_tokens_store = fakeredis.FakeStrictRedis()
    except:
        print("Cannot access to the required Redis instance")
        sys.exit(1)


def add(key, token, ttl=None):
    return revoked_tokens_store.set(key.encode("utf-8"), token, ex=ttl)


def get(key):
    value = revoked_tokens_store.get(key)
    if value is not None and hasattr(value, 'decode'):
        value = is_revoked.decode("utf-8")
    return value


def delete(key):
    return revoked_tokens_store.delete(key.encode("utf-8"))


def keys():
    keys = revoked_tokens_store.keys()
    if len(keys) > 0 and hasattr(keys[0], 'decode'):
        return [x.decode("utf-8") for x in revoked_tokens_store.keys()]
    else:
        return [x for x in revoked_tokens_store.keys()]


def clear():
    for key in keys():
        delete(key)


def is_revoked(decrypted_token):
    jti = decrypted_token["jti"]
    is_revoked = get(jti)
    return (is_revoked is None) or (is_revoked == "true")

@@ -737,26 +737,21 @@
 value = 
-is_revoked
+value
 .decode(

Fix get token function