cognitoIdentityServiceProvider.adminInitiateAuth(
  { AuthFlow: 'ADMIN_NO_SRP_AUTH',
  ClientId: '#',
  UserPoolId: '#',
  AuthParameters: { USERNAME: '#', PASSWORD: '#' } }, function(err, data) {
    if (err) console.log(err, err.stack); // an error occurred
    else     console.log(data);           // successful response
  });

{ InvalidSignatureException: The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.
at Request.extractError (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibprotocoljson.js:48:27)
at Request.callListeners (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibsequential_executor.js:105:20)
at Request.emit (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibsequential_executor.js:77:10)
at Request.emit (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibrequest.js:683:14)
at Request.transition (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibrequest.js:22:10)
at AcceptorStateMachine.runTo (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibstate_machine.js:14:12)
at F:VProjectsLocalsneo-loginnode_modulesaws-sdklibstate_machine.js:26:10
at Request.<anonymous> (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibrequest.js:38:9)
at Request.<anonymous> (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibrequest.js:685:12)
at Request.callListeners (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibsequential_executor.js:115:18)
at Request.emit (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibsequential_executor.js:77:10)
at Request.emit (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibrequest.js:683:14)
at Request.transition (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibrequest.js:22:10)
at AcceptorStateMachine.runTo (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibstate_machine.js:14:12)
at F:VProjectsLocalsneo-loginnode_modulesaws-sdklibstate_machine.js:26:10
at Request.<anonymous> (F:VProjectsLocalsneo-loginnode_modulesaws-sdklibrequest.js:38:9)
message: 'The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.',
  code: 'InvalidSignatureException',
  time: 2018-03-25T15:50:14.059Z,
  requestId: '33a041e1-3044-11e8-9a6c-e9e67b7f056d',
  statusCode: 400,
  retryable: false,
  retryDelay: 30.181592877625963 } 'InvalidSignatureException: The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.n    at Request.extractError (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\protocol\json.js:48:27)n    at Request.callListeners (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\sequential_executor.js:105:20)n    at Request.emit (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\sequential_executor.js:77:10)n    at Request.emit (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\request.js:683:14)n    at Request.transition (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\request.js:22:10)n    at AcceptorStateMachine.runTo (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\state_machine.js:14:12)n    at F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\state_machine.js:26:10n    at Request.<anonymous> (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\request.js:38:9)n    at Request.<anonymous> (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\request.js:685:12)n    at Request.callListeners (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\sequential_executor.js:115:18)n    at Request.emit (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\sequential_executor.js:77:10)n    at Request.emit (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\request.js:683:14)n    at Request.transition (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\request.js:22:10)n    at AcceptorStateMachine.runTo (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\state_machine.js:14:12)n    at F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\state_machine.js:26:10n    at Request.<anonymous> (F:\VProjects\Locals\neo-login\node_modules\aws-sdk\lib\request.js:38:9)'