update

app/Admin.php

@@ -55,7 +55,7 @@ class Admin extends Authenticatable implements Auditable
     use SoftDeletes;
     use \OwenIt\Auditing\Auditable;
 
-    const GUARD_NAME = "admin";
+    CONST GUARD_NAME = "admin";
 
     public function guardName()
     {
@@ -67,7 +67,9 @@ class Admin extends Authenticatable implements Auditable
      *
      * @var array
      */
-    protected $guarded = ['id'];
+    protected $fillable = [
+        'name', 'username', 'password','project_ids','remember_token'
+    ];
 
     /**
      * The attributes that should be hidden for arrays.
@@ -75,7 +77,7 @@ class Admin extends Authenticatable implements Auditable
      * @var array
      */
     protected $hidden = [
-        'password', 'remember_token',
+        'password'
     ];
 
     /**