I struggled for more than 3 hours to make the OTP email verification work properly using SendGrid.
I believe the current tutorial, is missing some crucial steps, not easily replicable for newbies and intermediate users.
I believe such an important functionality needs to be available also to the less experienced users.
That’s why I created this video, hope you like it!
Cheers
we always do! 
Hi, I followed your tutorial word for word, and did it with a brand new Sendgrid account (on the free plan), but I am running into the error below:
{
“errors”: [
{
“message”: “Permission denied, wrong credentials”,
“field”: null,
“help”: null
}
]
}
Please can you assist, this is such an annoying issue and it’s the only thing I’m struggling with. Thank you in advance.
I fixed it. Create a magic text element with the API and then insert the magic text next to the bearer. That worked for me.
Okay I’ll take another look at it, thank you!
I created an dynamic template and added it in the custom action so user will get much nicer verification email. Also if it is just short text google can flag it and move it to promotion or spam.
The code is from the example, it will change according to the random function.
It is a work in progress 
https://docs.sendgrid.com/ui/sending-email/how-to-send-an-email-with-dynamic-transactional-templates
