public String getSubjectToken() {
        return this.subjectToken;
    }
<p>
Used only when calling this API for the Token Exchange grant type. This value specifies the subject of the
exchange. The value of the subject token must be an access token issued by IAM Identity Center to a different
client or application. The access token must have authorized scopes that indicate the requested application as a
target audience.
</p>

@return Used only when calling this API for the Token Exchange grant type. This value specifies the subject of
        the exchange. The value of the subject token must be an access token issued by IAM Identity Center to a
        different client or application. The access token must have authorized scopes that indicate the requested
        application as a target audience.
aws-java-sdk-ssooidc/src/main/java/com/amazonaws/services/ssooidc/model/CreateTokenWithIAMRequest.java