require bcrypt only if needed

com/Unit/Update.lua

@@ -6,7 +6,6 @@
 local log = require("internal.log")
 local db = require("internal.database.sqlite").connect("db/unit.db", { log = true })
 local session = require("internal.session")
-local crypt = require("internal.crypt.bcrypt")
 
 local common = require("com/Unit/_common")
 local errors = require("com/Unit/_errors")
@@ -55,6 +54,7 @@ local values = {}
 for k, v in pairs(params.fields) do
   if allowed[k] then
     if k == "password" then
+      local crypt = require("internal.crypt.bcrypt")
       v = crypt.generate(v, crypt.DefaultCost)
     end
     table.insert(set_clauses, k .. " = ?")