Me thinks you have the wrong reference verse.
(John 8:26, 27) “. . .. As a matter of fact, the One who sent me is true, and the very things I heard from him I am speaking in the world.” 27 They did not grasp that he was talking to them about the Father.”
We do not have to guess, the inspired text reveals who the one is: the Father.
How does this verse help us understand scripture? Example:
(John 3:16, 17) “16 “For God loved the world so much that he gave his only-begotten Son, so that everyone exercising faith in him might not be destroyed but have everlasting life. 17 For God did not send his Son into the world for him to judge the world, but for the world to be saved through him.”
To whom does the title 'God' in this verse refer to? The triune God? No, for we know it was the Father who sent him.
Jesus helps to understand, the Father "is the only true God"
Paul agrees with this for he tells Christians: "only the Father is God"
So when the term 'God' is used in the bible, it is only referring to the Father.
and never to a trinity of Gods.