An error occurred (AccessDenied) when calling the CreateStack operation:

An error occurred (AccessDenied) when calling the CreateStack operation: User: arn:aws:iam::812520856627:user/dimitris is not authorized to perform: cloudformation:CreateStack on resource: arn:aws:cloudformation:us-west-2:812520856627:stack/blog-stage/*

I tried to run this on command :

aws cloudformation create-stack --stack-name blog-stage --template-body file://$PWD/stack.yml --profile demo --region us-west-2
Resources:
  AppNode:
    Type: AWS::EC2::Instance
    Properties:
        InstanceType: t2.micro
        ImageId: ami-0c579621aaac8bade
        KeyName: jimapos
        SecurityGroups:
          - !Ref AppNodeSG
  AppNodeSG:
    Type: AWS::EC2::SecurityGroup
    Properties:
        GroupDescription: for the app nodes that allow ssh, http and docker ports
        SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: '80'
          ToPort: '80'
          CidrIp: 0.0.0.0/0
          - IpProtocol: tcp
          FromPort: '22'
          ToPort: '22'
          CidrIp: 0.0.0.0/0

Source: StackOverflow