Now let's look at what the Bible says:
Acts 2:47
46 So continuing daily with one accord in the temple,
and breaking bread from house to house, they ate their food with
gladness and simplicity of heart,
47 praising God and having favor with all the people.
And the Lord added to the church daily those who were being
saved.
God ADDS those who are saved to the CHURCH.
Being saved and being in the church are the same thing.