Not authorized to perform textract:DetectDocument

Hello.

As mentioned in the error message, I think the IAM user you are using ({myEmail}.com) does not have the IAM policy to allow you to run "textract:DetectDocumentText".
So, please check whether "textract:DetectDocumentText" is allowed in the IAM policy attached to the IAM user.
If it is not allowed, try attaching the following IAM policy.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "textract:DetectDocumentText"
            ],
            "Resource": "*"
        }
    ]
}

IAM actions related to textract are described in the following documentation.
https://docs.aws.amazon.com/service-authorization/latest/reference/list_amazontextract.html