Input variable to module does not work

I am attempting to call a module and pass a single variable from main.tf in root (customer folder).

With the code below I keep being prompted for
var.auth_method
Enter a value:

I have tried all recommendations on this and probably my lack of experience in TF is showing.

I have gone through the documentation, read the forum posts, tried all types of formats to pass the variable as an input to the module and still cannot get this to work.

Terraform v1.1.7
on linux_amd64

├── customer
│ ├── main.tf
│ ├── terraform.tfvars
│ └── variables.tf
└── modules
------└── ftp_vpn
----------------------└── phase1
----------------------├── main.tf
----------------------├── variables.tf
----------------------└── terraform.tfvars

customer/main.tf
terraform {

required_providers {

  fortios = {

  source  = "fortinetdev/fortios"

}

}

}

provider “fortios” {

hostname = “1.1.1.1”

token = “SomeToken”

insecure = “true”

vdom = “Public-SAAS”

}

locals {

    auth_method = "psk"

}
module “customer_phase1” {

source = "../modules/ftg_vpn/phase1"

authmethod = "${var.auth_method}"

}

customer/variables.tf

variable “name” {
type = string
}
variable “vdom” {
type = string
}
variable “remote_gw” {
type = string
}
variable “local_gw” {
type = string
}
variable “mode_cfg” {
type = string
}
variable “nattraversal” {
type = string
}
variable “dpd” {
type = string
}
variable “dpd_retryinterval” {
type = number
}
variable “auth_method”{
type = string
}
variable “psksecret” {
type = string
}
variable “ike_version” {
type = number
}
variable “tunnel_phase1_proposal” {
type = string
}
variable “dhgrp” {
type = string
}
variable “keylife” {
type = string
}
variable “fortigate_interface” {
type = string
}
variable “peertype” {
type = string
}

customer/terraform.tfvars

auth_method = “qsk”

dhgrp = “5 14 21”

vdom = “FairW-SAAS”

FairWarning FW mgmt IP

#fortigate_ip_or_fqdn = “192.168.30.54”

API Token used for authentication

not sure how this is used yet

name=“CustomerName”

################# Phase1 ###########################

Customer Peer IP

remote_gw = “44.44.44.44”

Interface associated with WAN Traffic

fortigate_interface = “port5”

Local IP - peer ip the customer will connec to

local_gw = “2.2.2.2”

Tunnel mode - not sure what is is used for

mode_cfg = “disable”

IF remote gw ip is NAT’d

nattraversal = “disable”

Dead Peer Detection

dpd = “on-idle”

dpd_retryinterval = “5”

Pre-shared Key

psksecret = “1234567890”

Set Ike version to 2

ike_version = “2”

peertype =“any”

Phase1 Proposal

tunnel_phase1_proposal = “aes256-sha256”

Keylife - not sure what this is used for

keylife = “28800”

##############################################

modules/ftg_vpn/phase1/main.tf

terraform {

required_providers {

fortios = {

  source  = "fortinetdev/fortios"

}

}

}

provider “fortios” {

hostname = “1.1.1.1”

token = “sometoken”

insecure = “true”

vdom = “FairW-SAAS”

}

#Build Phase 1 of customer VPN

resource “fortios_vpnipsec_phase1interface” “vpn_phase1_interface” {

          **authmethod        = "${var.auth_method}"**

          interface         = "port5"

          name              = "CustomerName"

          remote_gw         = "44.44.44.44"

          local_gw          = "3.3.3.3"      

          mode_cfg          = "disable"

          nattraversal      = "disable"

          dpd               = "on-idle"

          dpd_retryinterval = "5"

          psksecret         = "1234567890"

          ike_version       = "2"

          proposal          = "aes256-sha256"

          dhgrp             = "5 14 21"

          keylife           = "28800"

          peertype          = "any"

}

##############################################

modules/ftg_vpn/phase1/variables.tf

variable “authmethod”{
type = string
}

variable “auth_method” {
type = string
}

##############################################

modules/ftg_vpn/phase1/terraform.tfvars

authmethod = “”