how to get OTP for Cognito user's ?

Question

I am using the 'User Cognito Pool' Service.

Here I am storing the user's mobile and email ID.

Also, I am using '**SNS**' and '**SES**' services to send OTP to log in to my web application.

'**SNS**' States that only **10 mobile numbers** can be registered.
if so, How do all users available in the 'User Cognito Pool' get OTP?

Answer

- you can batch of users from your user pool, based on some criteria
- For each user in the batch, send the OTP via SMS using AWS SNS. Make sure the user's mobile number is correctly registered with the SNS topic
- If you want to send OTPs via email as well,  you can use SES. You can use the SendEmail API to send emails with OTPs to the users.

update: 
https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-user-groups.html

https://docs.aws.amazon.com/cognito/latest/developerguide/tutorial-create-user-pool.html

how to get OTP for Cognito user's ?

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