authentication works

src/sales_backend/user.cr

@@ -11,11 +11,12 @@ end
 
 class User
     JSON.mapping(
-        addresses: {type: Array(Address), nilable: true},
-        invoices: {type: Array(Invoice), nilable: true},
-        tokens: {type: Array(UUID), nilable: true},
-        email: String,
-        password_hash: {type: String, nilable: true},
-        type:  {type: UserType, default: UserType::Normal},
+        addresses:      {type: Array(Address), nilable: true},
+        invoices:       {type: Array(Invoice), nilable: true},
+        tokens:         {type: Array(UUID), nilable: true},
+        email:          String,
+        password_hash:  {type: String, nilable: true},
+        active:         {type: Bool, default: false}, 
+        type:           {type: UserType, default: UserType::Normal},
     )
 end