How to fix Error: Error creating Storage Account: AccountNameInvalid in Terraform

# Incorrect
resource "azurerm_storage_account" "example" {
  name = "MyStorageAccount"  # Invalid: contains uppercase
}

# Correct
resource "azurerm_storage_account" "example" {
  name = "mystorageaccount"  # Valid: all lowercase
}

# Incorrect
resource "azurerm_storage_account" "example" {
  name = "my-storage-account"   # Invalid: contains hyphens
  name = "my_storage_account"   # Invalid: contains underscores
}

# Correct
resource "azurerm_storage_account" "example" {
  name = "mystorageaccount"  # Valid: only lowercase letters
}

# Incorrect
resource "azurerm_storage_account" "example" {
  name = "ab"              # Invalid: only 2 characters (minimum is 3)
  name = "mystorageaccount12345678901"  # Invalid: 32 characters (maximum is 24)
}

# Correct
resource "azurerm_storage_account" "example" {
  name = "mystorageaccount"  # Valid: 15 characters
}

resource "azurerm_storage_account" "example" {
  name = "st${substr(lower(replace(azurerm_resource_group.example.name, "-", "")), 0, 11)}${lower(uniqueString(azurerm_resource_group.example.id))}"
  # Results in: st{prefix}{uniquehash} - all lowercase, no special chars
}

# Incorrect
resource "azurerm_storage_account" "example" {
  name = "var.storage_account_name"  # Invalid: treats as literal string
}

# Correct
resource "azurerm_storage_account" "example" {
  name = var.storage_account_name  # Valid: references the variable
}