assign trainers to user; add email to jwt token

customerapi/controllers/LoginController.php

@@ -54,6 +54,7 @@ class LoginController extends CustomerApiController
                 ->issuedAt($time)// Configures the time that the token was issue (iat claim)
                 ->expiresAt($time + 3600)// Configures the expiration time of the token (exp claim)
                 ->withClaim('uid', $form->getCustomer()->getId())// Configures a new claim, called "uid"
+                ->withClaim('username', $form->getCustomer()->email)// Configures a new claim, called "username"
                 ->getToken($signer, $key); // Retrieves the generated token
 
             return $this->asJson([