Adds a given binary file to AWS Secrets Manager as base64 - this is only possible via the CLI or SDK as it's not supported in the AWS Console UI at this time
Second argument must be a binary file such as a QR Code screenshot - this is converted to base 64 because AWS only permits ASCII characters in this value
Caveat: your QR pic cannot be too big or complex or it'll result in too large a base64 string which gives this error:
An error occurred (ValidationException) when calling the CreateSecret operation: 1 validation error detected: Value at 'secretBinary' failed to satisfy constraint: Member must have length less than or equal to 65536
Workaround: instead of screenshotting, save the QR code png via right-click download, it'll result in a much smaller original png download which will be able to be saved to AWS Secrets Manager