Question of Christian Authority

This is a far left question but one I genuinely want to discuss. We know as Christians that Satan and demons walk the earth. Though they cannot possess people anymore due to the complete word of God being present and the gifts of Exorcism were taken away after the apostles, we know they can still affect our lives. We know even angels walk amongst us as we do not know when we entertain them. There was a time recently when my wife believed our house was inhabited by a ghost. I decided to say "if you're a ghost go on to the hadean realm and await judgement, but if you are a demon begone from this household." I had a recorder going that picked up something saying "suit yourselves I'm going home". Now even if this didn't happen, on a general question, do Christians still have the authority to say "begone satan" and demons leave our presence? Or is this something that could not possibly be in the realm of christan authority? Dont we have the ability to command Satan to leave us alone through the power of Christ since we are his?