Cognito login issue

Question

I have created a user pool on cognito but when i call initiate_auth() or or sign_up() function with email of length longer than 128 characters in the "USERNAME" attribute it gives "InvalidParameterException". Is there any way i can change the allowed length for the email to sing_up or log in??

Accepted Answer

Hi, as per https://docs.aws.amazon.com/cognito-user-identity-pools/latest/APIReference/API_AdminCreateUser.html. the AdminCreateUser accepts username only up to 128 chars:

```
Username
The username for the user. Must be unique within the user pool. Must be a 
UTF-8 string between 1 and 128 characters. After the user is created, 
the username can't be changed.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 128.
```

AFAIK, you cannot extend it.

Best,
Didier

Cognito login issue

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