That is only 2 - Father and Son.   
Jesus told us that He and His Father are One Joh 10:30 .   

Looking at John 1:1 we understand that eternal God is Word and Spirit (because God is Spirit Joh 4:24) .   

But Words proceed from a Mind which is part of a Soul.   

So, John is saying that God is Soul and Spirit (two).   But he also says the two are One Joh 1:1 .   

In the begetting act, the Holy Spirit produced the Body Of God whom we call Jesus Mat 1:18,20 .   

But John tells us that the Word was made flesh and dwelt among us Joh 1:14.    So, the Body Of God contains the Soul Of God and the Spirit Of God.   

God is Spirit Soul And Body just as we are who were created in His image Gen 1:26 .   

God is Jesus, who is
   → the express image of God Heb 1:3,
   → the Word of God Joh 1:14
   → filled with the Spirit Of God Mar 1:10 .   

There are not 3 persons.   
There are not 2 persons.   
There is only 1 person.   

Jesus Is God, the One and only.   That is what Jesus Is Lord means.   

Hear, O Israel: the Lord our Lord is one Lord: Deu 6:4 How much plainer can it be made?     There are not three gods or persons, there is only one being who is Lord and His name is Jesus.      Jesus Is Lord When you read or hear the word, Lord, think Jesus.