No one cares about the what the "apostolic authority" is. The Bible says otherwise. Deal with it.
So you believe whatever the councils said rather than what the Bible says? What does the Christian Bible not explain or describe what you refer to as the Trinity if it's a Christian doctrine?
Jesus does!
Apostolic church!
Sacred tradition (teaching)
The apostolic church was commanded by Christ to teach and sanctify all men unto eternal salvation Matt 28:19
Matt 16:18-19 And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it.
19 And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven.
Matt 18:17-18 And if he shall neglect to hear them, tell it unto the church: but if he neglect to hear the church, let him be unto thee as an heathen man and a publican.
18 Verily I say unto you, Whatsoever ye shall bind on earth shall be bound in heaven: and whatsoever ye shall loose on earth shall be loosed in heaven.
Lk 10:16 He that heareth you heareth me; and he that despiseth you despiseth me; and he that despiseth me despiseth him that sent me.
Jn 20:21 Then said Jesus to them again, Peace be unto you: as my Father hath sent me, even so send I you.
Acts 16:17
The same followed Paul and us, and cried, saying, These men are the servants of the most high God, which shew unto us the way of salvation.
Christ and his church are one! Acts 9:4 eph 5:24 and apostolic Matt 16:18-19 Matt 28:19 Matt 18:18 eph 2:20