Relation BelongToMany problem

1. how to change the BelongsToMany field to an input type field? When I add a Text field it does not appear in the view.

I don't understand, can you explain please ?

1. how to check if the user exists in the database when saving?

if (User::where('email', $typedEmail)->exists()) {
	...
}

Thank you for your response.

The BelongsToMany field by default is of select type, or after adding searchable() parameter it is searchable.

I would like to replace this field with a regular email address field, I don't want others to see what email addresses are in the database.

When the user enters an email address, the system checks if such an address exists in the database, if so it writes a relation to the database. If the email does not exist in the database then a message is returned, e.g. "The user does not exist".

Code snippet:

BelongsToMany::make(__('Instructors'), 'teamInstructors', 'App\Nova\User')
    ->searchable()
    ->hideFromIndex()
    ->hideFromDetail(function (NovaRequest $request) {
        $user = $request->user();
        if ($user->isAdmin() || $user->id == $this->user_id) {
            return false;
        }
        return true;
    })
    ->display('email'),

there is no need to modify anything on the backend, since what you want is a visual effect

When a User adding member to a team, just show the email or whatever you want at the front-end

I understand, just don't know how to change the select in the frontend.

I am new to laravel Nova, but as far as I know the frontend is generated automatically.