Since the D&C section 20: 17-28 has the Nicene Creed wouldn't that make it authoritative
Interesting...
17 By these things we know that there is
a God in heaven, who is infinite and eternal, from everlasting to everlasting the same unchangeable God, the framer of heaven and earth, and all things which are in them;
So, notice, it says
a God, not THE God.
"Framer of heaven and Earth" and being in, of and through all things indicates it is talking about Jesus Christ. (Validated by D&C 63:59; 76:24; 88:6; 93:10)
18 And that he created man, male and female, after his own image and in his own likeness, created he them;
19 And gave unto them commandments that they should love and serve him, the only living and true God, and that he should be the only being whom they should worship.
20 But by the transgression of these holy laws man became sensual and devilish, and became fallen man.
All this is true. Jesus is our Creator, Redeemer, and Judge. He's the one who gave the law, as Jehovah in the Old Testament, and as Jesus in the New Testament.
21 Wherefore, the Almighty God gave his Only Begotten Son, as it is written in those scriptures which have been given of him.
"the Almighty God" is clearly referring to the Father.
22 He suffered temptations but gave no heed unto them.
23 He was crucified, died, and rose again the third day;
24 And ascended into heaven, to sit down on the right hand of the Father, to reign with almighty power according to the will of the Father;
25 That as many as would believe and be baptized in his holy name, and endure in faith to the end, should be saved—
26 Not only those who believed after he came in the meridian of time, in the flesh, but all those from the beginning, even as many as were before he came, who believed in the words of the holy prophets, who spake as they were inspired by the gift of the Holy Ghost, who truly testified of him in all things, should have eternal life,
27 As well as those who should come after, who should believe in the gifts and callings of God by the Holy Ghost, which beareth record of the Father and of the Son;
28 Which Father, Son, and Holy Ghost are one God, infinite and eternal, without end. Amen.
one God, meaning "the Godhead". We worship the collectively, not individually.
If that's the Trinity - then sign me up.