[BUG] Users can use other peoples characters

[JackGamesFTW]

Describe the bug A user can join a server with qbcore running and load in as someone elses character then they can proceed to dupe money & items

To Reproduce Steps to reproduce the behavior:

1. Join a server
2. Open the chrome inspector and run the following javascript with the citizen id of the character you want to use

   $.post('https://qb-multicharacter/selectCharacter', JSON.stringify({
   cData: { citizenid: 'citizen id here' }
   }));
   setTimeout(function(){
   qbMultiCharacters.fadeOutDown('.characters-list', "-40%", 400);
   qbMultiCharacters.fadeOutDown('.character-info', "-40%", 400);
   qbMultiCharacters.resetAll();
   }, 1500);

Expected behavior I won't be able to use other peoples characters then if I tried it would kick/ban me

Questions (please complete the following information):

• When you last updated: Today
• Are you using custom resource? which ones? no
• Have you renamed qb- to something custom? no

Additional context I noticed there are checks for this stuff when you try to delete a character but for some reason not when you try to login

[GhzGarage]

Ban them for cheating

[mason-rogers]

Ban them for cheating

or fix the security exploit ???

[JackGamesFTW]

Since your solution is "Ban them for cheating". In the pr above I have fixed the security exploit for you.