DynamoDB example missing ·ExpressionAttributeNames: expr.Names(),

[kaihendry]

https://github.com/aws/aws-sdk-go-v2/blob/master/service/dynamodb/expression/examples_test.go#L107-L112

·ExpressionAttributeNames: expr.Names(), is needed, else you will get these odd:

ValidationException: Invalid KeyConditionExpression: An expression attribute name used in the document path is not defined; attribute name: #0

[jasdel]

Thanks for reporting this issue. We'll fix this in both the v1 and v2 SDK's examples.