如何使用SigV4使用临时凭据调用API网关？

Question

我需要使用临时凭据来调用API Gateway，并依次使用congito用户组IAM角色。我使用下面的代码获得了临时的证明。

 var data = {
      UserPoolId: config.cognito.USER_POOL_ID,
      ClientId: config.cognito.APP_CLIENT_ID,
    };
    var userPool = new cognito.CognitoUserPool(data);
    var cognitoUser = userPool.getCurrentUser();
    if (cognitoUser != null) {
      cognitoUser.getSession(function(err, session) {
        if (err) {
          console.log(err);
          return;
        }

        console.log('session validity: ' + session.isValid());
        console.log('session Identity token: ' + session.getIdToken().getJwtToken());

        AWS.config.region = config.cognito.REGION;
        AWS.config.credentials = new AWS.CognitoIdentityCredentials({
          IdentityPoolId : config.cognito.IDENTITY_POOL_ID, 
          Logins : {
            // Change the key below according to the specific region your user pool is in.
            'cognito-idp.ap-south-1.amazonaws.com/ap-south-1_G7YbVmvPG': session.getIdToken().getJwtToken()
          }
        });

        AWS.config.credentials.get(function(err,data) {
          if (!err) {
            var id = AWS.config.credentials.identityId;
            var key = AWS.config.credentials.accessKeyId;
            var secretkey = AWS.config.credentials.secretAccessKey;
            var sessionToken = AWS.config.credentials.sessionToken;
            console.log('Cognito Identity ID '+ id);
            console.log('Cognito Key '+ key);
            console.log('Cognito Secret Key '+ secretkey);
            console.log('Cognito SessionToken '+ sessionToken);
          }
        });
      });
    } 

当依次调用必要的IAM角色时，我如何需要用sigv4签名APi网关请求并将此凭据发送给它？

谢谢 感谢您的帮助