I'm using then Sendgrid's account trial and used API key that has full access. I also referred to this documentation doc
This is always the results
I'm using then Sendgrid's account trial and used API key that has full access. I also referred to this documentation doc
This is always the results
I found it.
You should use Guzzle and this API: https://sendgrid.api-docs.io/v3.0/contacts/add-or-update-a-contact.