Fix Terraform Error - No Valid Credential Sources Found

Error: No valid credential sources found

# Option 1: Environment variables
export AWS_ACCESS_KEY_ID="your-access-key"
export AWS_SECRET_ACCESS_KEY="your-secret-key"
export AWS_REGION="us-east-1"
 
# Option 2: AWS CLI profile
aws configure
# Then reference in Terraform:

provider "aws" {
  region  = "us-east-1"
  profile = "my-profile"
}

# Option 3: SSO — refresh session
aws sso login --profile my-sso-profile
 
# Option 4: Check IAM role (EC2/ECS)
curl http://169.254.169.254/latest/meta-data/iam/security-credentials/

# Login via CLI
az login
az account set --subscription "your-subscription-id"
 
# Or use service principal
export ARM_CLIENT_ID="xxx"
export ARM_CLIENT_SECRET="xxx"
export ARM_SUBSCRIPTION_ID="xxx"
export ARM_TENANT_ID="xxx"

# Application default credentials
gcloud auth application-default login
 
# Or service account key
export GOOGLE_APPLICATION_CREDENTIALS="/path/to/key.json"

# Never hardcode credentials — use environment variables
provider "aws" {
  region = var.aws_region
  # Credentials come from environment
}