if (awsCredentials.getSessionToken() == null) {
                credentials =  new BasicAWSCredentials(awsCredentials.getAccessKey(), awsCredentials.getSecretKey());
            } else {
                credentials =  new BasicSessionCredentials(awsCredentials.getAccessKey(), awsCredentials.getSecretKey(), awsCredentials.getSessionToken());
            }
        }

}

// MapClaims - implements custom unmarshaller
type MapClaims struct {
	AccessKey string `json:"accessKey,omitempty"`
	jwtgo.MapClaims
}

// GetAccessKey will return the access key.
// If nil an empty string will be returned.
func (c *MapClaims) GetAccessKey() string {
	if c == nil {
		return ""
	}
	return c.AccessKey
}

// NewStandardClaims - initializes standard claims