Change the default Laravel authentificaton email field to user_email

Laravel error when I change the email field from database to user_email

Illuminate\Database\QueryException SQLSTATE[42S22]: Column not found: 1054 Unknown column 'email' in 'where clause' (SQL: select * from ns_users where email = admin@yahoo.com limit 1)

Schema::create('ns_users', function (Blueprint $table) {
        $table->increments('user_id');
        $table->boolean('active')->default(0);/*by default the user is not active*/
        $table->integer('role')->default(0);/* role 0 means user and role 1 means admin!! */
        $table->string('name');
        $table->string('user_email')->unique();
        $table->timestamp('email_verified_at')->nullable();
        $table->string('password');
        $table->rememberToken();
        $table->timestamps();
});

Does anybody know what I have to change in default auth to work with user_email field instead of email?

By default, Laravel uses the email field for authentication. If you would like to customize this, you may define a username method on your LoginController:

public function username()
{
    return 'user_email';
}