diff --git a/app/Controllers/RestAuthenticationController.php b/app/Controllers/RestAuthenticationController.php
index 04bb4cb..78ee61e 100755
--- a/app/Controllers/RestAuthenticationController.php
+++ b/app/Controllers/RestAuthenticationController.php
@@ -158,8 +158,8 @@ class RestAuthenticationController extends AdminController
             }
 
             $otp = random_int(100000, 999999);
-            $default_otp = env('DEFAULT_OTP');
-            $is_send_sms_otp = env('IS_SEND_SMS_OTP');
+            $default_otp     = env('DEFAULT_OTP') ?? '';
+            $is_send_sms_otp = filter_var(env('IS_SEND_SMS_OTP') ?? true, FILTER_VALIDATE_BOOLEAN);
 
             if(!empty($default_otp)){
                 $otp = $default_otp;
@@ -283,8 +283,8 @@ class RestAuthenticationController extends AdminController
 
             $otp = random_int(100000, 999999);
 
-            $default_otp = env('DEFAULT_OTP');
-            $is_send_email_otp = env('IS_SEND_EMAIL_OTP');
+            $default_otp     = env('DEFAULT_OTP') ?? '';
+            $is_send_email_otp = filter_var(env('IS_SEND_EMAIL_OTP') ?? true, FILTER_VALIDATE_BOOLEAN);
 
             if(!empty($default_otp)){
                 $otp = $default_otp;
@@ -616,8 +616,8 @@ class RestAuthenticationController extends AdminController
 
             $otp = random_int(100000, 999999);
 
-            $default_otp = env('DEFAULT_OTP');
-            $is_send_sms_otp = env('IS_SEND_SMS_OTP');
+            $default_otp     = env('DEFAULT_OTP') ?? '';
+            $is_send_sms_otp = filter_var(env('IS_SEND_SMS_OTP') ?? true, FILTER_VALIDATE_BOOLEAN);
 
             if(!empty($default_otp)){
                 $otp = $default_otp;
@@ -694,8 +694,8 @@ class RestAuthenticationController extends AdminController
           
             $otp = random_int(100000, 999999);
 
-            $default_otp = env('DEFAULT_OTP');
-            $is_send_email_otp = env('IS_SEND_EMAIL_OTP');
+            $default_otp     = env('DEFAULT_OTP') ?? '';
+            $is_send_email_otp = filter_var(env('IS_SEND_EMAIL_OTP') ?? true, FILTER_VALIDATE_BOOLEAN);
 
             if(!empty($default_otp)){
                 $otp = $default_otp;