Not the Church. Jesus Christ instructed Peter and the Apostles. If you have a problem with the forgiveness of sin by the ordained, you’ll have to take it up with Him. We’re following His instructions, not Calvin’s or anybody else’s.
I doubt it will come up because He knows that I know that there is only one mediator between God and men. The Church's interpretation of John 20:23 sets up man as an equal to God, and defies many other scriptures such as:
Isa 43:25 : "I, even I, am he who blots out your transgressions, for my own sake, and remembers your sins no more.
Mic 7:18 : Who is a God like you, who pardons sin and forgives the transgression of the remnant of his inheritance? You do not stay angry forever but delight to show mercy. .... [Apparently Micah didn't know who was coming to be a "God like Him".]
Acts 8:22 : Repent of this wickedness and pray to the Lord. Perhaps he will forgive you for having such a thought in your heart. .... [Isn't it fascinating that Peter did not tell Simon to confess his sins to him (Peter), or any other Apostle, in order to receive forgiveness?]
Acts 13:38-39 : 38 "Therefore, my brothers, I want you to know that through Jesus the forgiveness of sins is proclaimed to you. 39 Through him everyone who believes is justified from everything you could not be justified from by the law of Moses. .... [Paul knew what his authority really was. Nowhere does Paul, or anyone other Apostle say "Confess you sins to me and I will forgive you.]
There is no practice of men forgiving sins here, or anywhere else in the Bible that I can find. Even at Pentecost, did Peter conduct a mass confession to him? No, he said to repent in the name of Christ for the forgiveness of sins. I'm not certain, but this may be the only power supposedly granted by God that is never used as far as we know from scripture. I find that very odd.
There is ultimately just one interpretation of one verse, as opposed to many other verses that say it is God who forgives sins, and that Christ is our only mediator. Redefining the word "mediator", as the Church has done to allow the interposition of men in between God and His children, does not change what it means in the scriptures.