cdk deployを実行して「Unable to resolve AWS account to use. It must be either configured when you define your CDK or through the environment」のエラーが発生した場合の解決策の一つとして記載します。

前提条件

Ubuntu 18.04.4 LTS(WSLの利用)

cdk deploy --profile xxx を実行すると Unable to resolve～エラー

$ cdk deploy --profile xxx
Unable to resolve AWS account to use. It must be either configured when you define your CDK or through the environment

~/.aws/configを確認する

~/.aws/config

$ cat ~/.aws/config 
[profile xxx]
region = ap-northeast-1
[default]
region = ap-northeast-1
[xxx]
region = ap-northeast-1

[profile xxx]を削除する

~/.aws/config

$ cat ~/.aws/config 
[default]
region = ap-northeast-1
[xxx]
region = ap-northeast-1

cdk deployの再実行

$ cdk deploy --profile xxx
CdkXXXXXXXStack: deploying...
CdkXXXXXXXStack: creating CloudFormation changeset...
[██████████████████████████████████████████████████████████] (3/3)

 ✅  CdkDynamodbStack

Stack ARN:
arn:aws:cloudformation:ap-northeast-1:XXXXXXXXXXXX:stack/CdkXXXXXXXStack/XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX

解決