Fatal error: Uncaught InvalidArgumentException: Found 1 error while validating the input provided for the AdminUpdateUserAttributes operation: [Username] expected string length to be >= 1, but found string length of 0 in /home/sso/public_html/vendor/aws/aws-sdk-php/src/Api/Validator.php:65 Stack trace: #0 /home/sso/public_html/vendor/aws/aws-sdk-php/src/Middleware.php(78): Aws\Api\Validator->validate('AdminUpdateUser...', Object(Aws\Api\StructureShape), Array) #1 /home/sso/public_html/vendor/aws/aws-sdk-php/src/IdempotencyTokenMiddleware.php(77): Aws\Middleware::Aws\{closure}(Object(Aws\Command), NULL) #2 /home/sso/public_html/vendor/aws/aws-sdk-php/src/AwsClientTrait.php(64): Aws\IdempotencyTokenMiddleware->__invoke(Object(Aws\Command)) #3 /home/sso/public_html/vendor/aws/aws-sdk-php/src/AwsClientTrait.php(58): Aws\AwsClient->executeAsync(Object(Aws\Command)) #4 /home/sso/public_html/vendor/aws/aws-sdk-php/src/AwsClientTrait.php(86): Aws\AwsClient->execute(Object(Aws\Command)) #5 /home/sso/public_html/cognitoLib.php(331) in /home/sso/public_html/vendor/aws/aws-sdk-php/src/Api/Validator.php on line 65