Support engines AWS

[Legumtechnica]

This does not support neural and long-form engines although it shows neural, throws an error "Unhandled Exception: 400: Bad Request A required parameter is missing, empty, or null. Or, the value passed to either a required or optional parameter is invalid. A common issue is a header that is too long. Bad Request"

and long-form engine does not exist

[markokosticdev]

Please provide more date so we can fix it