How to do email remainder in the cloud platform

I tried to do email remainder using Email V2 Api. But, it is not working. it’s 202 Error code.
here attached SS for your reference. could someone help in this?

Hey @Atharshan_Shriram_MD check the API token that you are passing.

No, I am not passing any API token here.
I am passing only the x-api-key.
Could you help me what to do further?

@Atharshan_Shriram_MD has this sender email been configured to the botID you’ve passed?