Hello! I am trying to use Postman to send emails using the API, so far I noticed that the authorization may be the problem but can you please guide me in the right direction?

I have used the URL https://mail.zoho.com/api/accounts/<account id>/messages that is described on this documentation here

I also used the params described there putting them into the body and used my ouath access token in the headers with the Authorization: Zoho-oauthtoken <My Access token>

but then when I send the request I get the following error: (Which again, I think is related to the fact that the URL provided uses a different authentication, but I could not find the right endpoint to send emails with access tokens or using oauth )

can you please help me or guide me in the right direction on how to properly send an email using oauth?