Unable to use conditional validation rules

I am binding directly to the model property. I am unable to submit the form as there are two forms in a single livewire component. 1st form is to edit the user, which consist of name, email, role, and the 2nd form is to invite the user, which consist of email.

I am unable to submit the form as I have combinedly stated the rules for both the forms under the rules protected property. So when ever I try to edit a user, using the first form, It checks for email field as well, which is present in the invitation form. How can I make it work in this structure.

• App\Http\Livewire\UserController.php

public $showUserManagementModal = false;
public $showUserInvitationModal = false;

public User $user;
public Invitation $invitation;

protected function rules() {
    if ($showUserManagementModal = true)
        return [
            'user.name' => 'required | string | max:255',
            'user.email' => 'required | string | email | max:255',
            'role' => 'required',
        ];

    if ($showUserInvitationModal = true)
        return [
            'invitation.email' => 'required | string | email | max:255 | unique:invitations,email',
        ];
}

public function createInvitation() {
    $this -> useCachedRows();

    $this -> resetValidation();
    $this -> invitation = new Invitation();
    $this -> showUserInvitationModal = true;
}

public function saveInvitation() {
    $this -> validate();
    $this -> invitation -> generateInvitationToken();
    $this -> invitation -> save();
    $this -> showUserInvitationModal = false;
}

public function manageUser(User $user) {
    $this -> useCachedRows();

    $this -> resetValidation();
    $this -> user = $user;
    $this -> role = $user -> roles -> pluck('id');
    $this -> showUserManagementModal = true;
}

public function saveUser() {
    $this -> validate();
    $this -> validate([
        'user.email' => 'unique:users,email,'.$this -> user -> id,
    ]);
    $this -> user -> roles() -> sync($this -> role);
    $this -> user -> save();
    $this -> showUserManagementModal = false;

    $this -> dispatchBrowserEvent('notify', $this -> user -> name.' Updated Successfully');
}