Able to register new bots with existing email/name when using MemoryStorage

[indrif]

Example run:

POST /bots {'name': 'Testbot', 'email': '[email protected]'}
<<< 200 {"id":null,"name":"Testbot","email":"[email protected]","token":"c1bb670c-fb46-4203-a96c-c669eebc1b90","boardToken":null}
Received token c1bb670c-fb46-4203-a96c-c669eebc1b90
POST /bots {'name': 'Testbot', 'email': '[email protected]'}
<<< 200 {"id":null,"name":"Testbot","email":"[email protected]","token":"a0d74eed-5cd4-4d5f-a3c8-6cdf9b04ab4a","boardToken":null}
Received token a0d74eed-5cd4-4d5f-a3c8-6cdf9b04ab4a

Should receive 409 status from second POST.

Environment:
MemoryStorage