Jeanie, please Prove that the name of Jesus is God the Father! Just making the claim isn't proof! As for John 5:43;

“I have come in my Father’s name.” (John 5:43).

At verse 43 Jesus makes a contrast which Oneness folk such as Jeanie will always ignore. Here Jesus contrasts his coming in his own name, with the false prophets such as these Jews, who had just been plotting to kill him, who come in their own name. Oneness people ignore this second reference to the false prophets, coming in their own authority, for to “come in their own name” doesn’t means they came quoting a proper name like Eli, Ruben or David. The word for name in the Greek is “onoma” and it here means authority.

So the Son comes in his Father’s name or authority at verse 43, which is why Jesus had so carefully told us in the previous verses that the Father testifies to the Son’s Messiahship. This is then contrasted in the second half of this verse, with those Jews, who having plotted to murder him, had come in their own authority to judge and then to kill the Son of God. Jesus by contrast judges all men (22), and the Father testifies to this judgement (32), which is why Jesus comes in the name or authority of his Father. These wicked Jews however, have not heard the Father’s voice (37), they also deny his word (38), and are spiritually dead (39), because they don’t love the Father (42). So they by way of contrast, they come in their own name or authority, as the Father will not testify of them and their judgement of the Son as he does of Jesus.