feat: add `user`, `token` and `salt` variables to widget options for Navidrome

variables.tf

@@ -46,8 +46,11 @@ variable "services_config" {
               type     = optional(string)
               url      = optional(string)
               key      = optional(string)
+              user     = optional(string)
               username = optional(string)
               password = optional(string)
+              token    = optional(string)
+              salt     = optional(string)
             }))
           })
         )