Answer:
A role mapped with 'consumer' access inside the locker needs to be assigned to this developers user account
Explanation:
This question provides us with an issue. A developer has been given necessary credentials to log into a locker. He does so but finds that the locker has nothing inside. He then creates his own credential variables but the issue now is that he cannot use these variables. To solve this problem, A role mapped with 'consumer' access inside the locker would have to be assigned to this developers user account so that he can use these variables.