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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 get_unique_connection_configs(config=None):
 """ Returns a list of unique Redis connections from config """

    if config is None:
        from .settings import QUEUES
        config = QUEUES

    connection_configs = []
    for key, value in config.items():
        value = filter_connection_params(value)
        if value not in connection_configs:
            connection_configs.append(value)
    return connection_configs